Dominator® Synthetic 5W-20 Racing Oil (RD20)
AMSOIL Dominator® Synthetic 5W-20 Racing Oil (RD20) provides superior performance and maximum protection in high-performance and racing applications. DOMINATOR is engineered from advanced synthetic technology to better withstand the elevated rpm, high temperatures and shock-loading common to racing applications.
Product Code: RD20 •
Brand: AMSOIL
Product Details
Tech Data
Reviews & Rating
Product Applications Product Application Specs • Modified small block
Product Description
Fights Engine Wear
Maximizes Horsepower
Excellent All-Temperature Performance
Commercial Availability
Service Life HEALTH & SAFETY Click here to view the MSDS Data Sheet for AMSOIL RD20. Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
Buy only the best oil for your car or truck!!This is the best oil you can buy Does a car eng. good !! Item Reviewed: Racing Motor Oils
Yes!!Dropped my water temp by 12 degrees !! Great product ! Item Reviewed: Racing Motor Oils
I will continue using this oil..I use this product in my street rod, a 1930 ford with a 466 inch ford motor. I believe the oil is dewing its job but when I been submitting the oil for testing I am getting results that do not make sense. Other wise I will continue using this oil.. Item Reviewed: Racing Motor Oils
Great oil, run amsoil in everything I ownGreat oil, run it in our Briggs animal kart motors on methonal... Keeps the motor at cooler running temps Item Reviewed: Racing Motor Oils
Nothing But the BestI wouldn't use anything else in our racing engine. This engine had 300,000 miles on it when we put it in our racecar. Now, in the racecar, it's lasted 2 full seasons and still going strong. Item Reviewed: Racing Motor Oils
The only oil we use for hard racingWe run this in our imca 604 crate engine works great Item Reviewed: Racing Motor Oils
Top notch oil.Best there is! Item Reviewed: Racing Motor Oils
Z-Rod is the best for forced inductionWorks great in my supercharged Vette! Item Reviewed: Racing Motor Oils
Great product, I'll be purchasing more soonGreat product and customer service Item Reviewed: Racing Motor Oils
I've used it for years and feel it is the best you can buyNecessary to maintain the 1966 396 engine in my Super Sport. Full synthetic has many added values over conventional oil especially in cars that get low mileage, irregular usage. Item Reviewed: Racing Motor Oils
Best oilGreat oil for my 60 yr old car, I also amsoil in modern cars better fuel mileage Item Reviewed: Racing Motor Oils
Love it!As usual awesome stuff! Item Reviewed: Racing Motor Oils
I'm sure I won't be disappointedI use Amsoil in all my vehicles. Bought this for my 1977 Ford F-250 after the top end of the original 351M was rebuilt. Thought it would be the right choice for this classic motor. Time will tell. Item Reviewed: Racing Motor Oils
Older Cars:This is beneficial to eliminate wear in older cars from the oil not having zinc. Very happy with this product and recommend it. Item Reviewed: Racing Motor Oils
I will buy this oil again, it is the only oil to useI use this oil in a pair of merc 540's, which have been dyno'd over 600hp. It's the only oil I will use and with over 300 hours on these engines, this says it all. Item Reviewed: Racing Motor Oils
BMW OILGreat oil for BMW airheads Item Reviewed: Racing Motor Oils
The perfect "old car" oilI've used Amsoil for years in all my diesels now it's time for my old cars too. Great product and I'm very happy with the results Item Reviewed: Racing Motor Oils
Pampering my baby!This goes into my '69 Corvette, 427 internal protection is the target for this oil. I like the rust inhibitor that is present to protect the internal components of the engine when it is inactive and the over all protection when I take her out for a drive. A good oil at a good price. Item Reviewed: Racing Motor Oils
I will continue to purchase this productPerfect weight for a big block Chev, doesn't blow through the motor while racing, like similar oils do. Great product from a great company Item Reviewed: Racing Motor Oils
No other oil for my Chevy 540I've tried a number of different motor oils over the years. Mobil 1, Royal Purple and a few others. Amsoil Z-Rod is definitely the best oil I've ever used in my Reher Morrison Chevy 540 big block. The engine maintains a higher oil pressure even on a hot day! Appears I've gained additional horsepower also! Item Reviewed: Racing Motor Oils
Great oilUsing it in my mower engine running cooler and oil is staying clean after 20 hour of running hard. Item Reviewed: Racing Motor Oils
Best product of its kind on the marketThe only oil I'll use in my racecars Item Reviewed: Racing Motor Oils
The only oil that I use for everythingIf you dont want to wipe out cam lobes, USE THIS PRODUCT!!!!!!!!!!!!! Item Reviewed: Racing Motor Oils
This is top notch racing oil!I have been running Amsoil in my last 3 cars I love it and the protection it offers! Item Reviewed: Racing Motor Oils
I would buy this againBought it for a 73 mustang. Love the product. Item Reviewed: Racing Motor Oils
The bestPerfect for a air cool VW Item Reviewed: Racing Motor Oils
Hot Rod OilI bought this oil based on the fact that it has extra added Zinc for flat tappet cams generally used in hot rod motors and the fact it is known in the hobby to be excellent oil. Item Reviewed: Racing Motor Oils
Great for high zinc enginesUsed product for engine with high compression and required high zinc content Item Reviewed: Racing Motor Oils
I like Amsoil prodoucts.I have a '73 Bronco with a 302 V-8 engine. It has a mild flat tappet cam and a few other goodies. Because of the 'flat tappet cam' the engine needs oil with zinc. The Amsoil Z-ROD Syn. is exactly what the 302 ci. needs as it contains high levels of ZDDP for max. protection. Item Reviewed: Racing Motor Oils
Good for Old JeepsI use this product in my 1952 M38A1 Willy's Army Jeep Item Reviewed: Racing Motor Oils
Great products for my business/shop.I have been a long time Amsoil user myself for all my racecar/street car applications. When I opened my shop it was only fitting to stick with the best! All my customers cars/builds get Z-rod or Dominator series and with great results. Item Reviewed: Racing Motor Oils
Love amsoilAmszoil is the best Oil I've ever used I'm back to using it after realizing the higher price is worth the way higher quality Item Reviewed: Racing Motor Oils
Good stuff!Use in my 1969 Corvette. Item Reviewed: Racing Motor Oils
Run this in my 602 circle track crate engineI use this product in my 602 crate circle track engine to optimize HP all the meantime protecting my engine from the harsh elements. Love this oil. Item Reviewed: Racing Motor Oils
Amsoil 10W-30 for my 1969 Dodge Charger 426 HemiI wanted the best flowing highest zinc content for my Hemi Charger. Amsoil was my choice. Cost a little more but only the best for my baby!!! Item Reviewed: Racing Motor Oils
Excellent racing oil.Best racing oil I have used in high horsepower racing go karts. Item Reviewed: Racing Motor Oils
Been using Amsoil 15w50 Dominator for over 10 yearsI use this in my EBR1190rx race bike, engine has been raced or on track for 8000 miles, engine is still in amazing condition, no loss in power, compression and leak down test are top notch. Item Reviewed: Racing Motor Oils
Great productGreat oil for your vehicle. Wouldn't use anything else Item Reviewed: Racing Motor Oils
Perfect oil to protect your classic car.After much research needed a top quality oil to protect my 44 year old classic car. Z Rod fits the bill. The best protection out there. Item Reviewed: Racing Motor Oils
Best product for my applicationI use this oil in my '93 k2500 suburban with the 454tbi motor, It has a mild cam that calls for a zinc additive. I get my used oil lab tested and the tests show that this oil holds up better and provides more protection than the previous high-zinc oil I was using. I now use Amsoil in all of my vehicles and recommend it to friends every time. Item Reviewed: Racing Motor Oils
Pretty much the best racing oil out there!I've been using Amsoil for over 5 years now. This stuff is really incredible! Even with higher oil temps it really does hold up well over a long race. We recently started using this in our endurance car (Acura Integra) and so far it has held up remarkably well! Item Reviewed: Racing Motor Oils
Good ProductGood Product and helpful people at their Las Vegas warehouse Item Reviewed: Racing Motor Oils
Noticed a Difference Then Bought 2 CasesOne of the higher Zinc oils my motor loves. It quieted my lifter tick and my motor just feels more healthy overall. Bought two cases after making sure it was really helping. Item Reviewed: Racing Motor Oils
Amazing stuffAs always amsoil comes through and produces one amazing product! Does everything promises. Great oil for great price. Use amsoil products on all my cars! Item Reviewed: Racing Motor Oils
zrod 10w30 will continue to buy for the life of my car!I use this on my c6 corvette that has a cam and upgraded valvetrain. with this oil my oil pressure is alot more consistent even in the more extreme oil temps. i used to use mobil one synthetic but that stuff is like water compared to this oil at high temps. my motor is protected and i feel alot more confident driving my car hard Item Reviewed: Racing Motor Oils
Great specs on oil for antique autosI run AMSOIL oil and gear lube I all my antique autos. Unbeatable protection in my opinion for older, seldom driven vehicles. Item Reviewed: Racing Motor Oils
Awesome motor oilI use this in my 68 gto, fantastic zinc content, holds solid psi even in warmer temps. Won't use anything else. Item Reviewed: Racing Motor Oils
Good stuffSeems to keep the engine purring smoothly even after "getting on it" once daily driven now weekend fun car - Item Reviewed: Racing Motor Oils
Zinc for flat tappet enginesI use this oil in Ford 390 FE engine with flat hydraulic flat tappets, and 235 inline 6 Chevy with flat tappets. The correct amount of zinc is why I use this oil. Item Reviewed: Racing Motor Oils
The only oil I'll buy from now onI started running it in my big block camaro and I won't run anything else. The engine runs smoother and it also brought the temps down Item Reviewed: Racing Motor Oils
Great product always reccomend itInuse it for my tranny and motor oil Item Reviewed: Racing Motor Oils
Great oilI think this is the best oil for my '68 Firebird. Item Reviewed: Racing Motor Oils
A Slick Deal!Put Amsoil in my 03 Cobra engine and transmission. Noticed a positive difference right away. Engine started faster and idled smoother. My T56 Magnum trans(6 speed) shifted gears more smoothly as well. Item Reviewed: Racing Motor Oils
I will buy againAbsolutely love the quality of amsoil!! I use only the best on my motors! Item Reviewed: Racing Motor Oils
Most DEFIANTLY BUY AGAINProduct is GREAT!!! I use in my Yamaha YXZ and can NOT complain about this oil. I have been in the red on my gauges for over half a race and still to this day have not had any motor issues. Item Reviewed: Racing Motor Oils
Great oilLove this oil for my supercharged car with 180k miles. Item Reviewed: Racing Motor Oils
Perfect for an older engineI choose this for my 79 Mustang as it has a non-roller cam and I want to ensure the longest wear and service from the cam and the engine. I trust this oil to meet the needs of my car which are different than modern ones. Item Reviewed: Racing Motor Oils
One of the best products I've found for my engines.This is a great product for after rebuilding and maintaining my all aluminum block Rover engines. I use it in both my competition trail truck and my daily driver. Item Reviewed: Racing Motor Oils
I will buy this product againI road race a large ci fe ford. It is pushing 4000 miles. The engine has never been freshened and it has never had a failure! Item Reviewed: Racing Motor Oils
Don't have anything elseIn my 2011 Flush Stage 2 Mustang. Never worry about a thing using Amsoil. I have been using Amsoil in all my vehicles in sliding my 2009 HD Softail Custom Item Reviewed: Racing Motor Oils
Amazing oilMix with pump 91 gas for my superjet jet ski. The best oil I've ever used and smells great ! Item Reviewed: Racing Motor Oils
Not sureLittle concerned my vehicle never used any oil before using the competitors brand I have used I have used a half quart of Amsoil oil now on the last seven hundred miles Item Reviewed: Racing Motor Oils
Great productWe rebuild a lot of vintage flat tappet engines. This product performs as advertised; we have had excellent results for years. Item Reviewed: Racing Motor Oils
Buy Amsoil!Great product, delivered super-fast. Item Reviewed: Racing Motor Oils
Great for my performance toysI use this oil for both my Superformance AC Cobra MK3 and 93 Mustang GT with 347 Ford Performance engine. I feel confident I am getting the best protection money can buy! Item Reviewed: Racing Motor Oils
Great protection for all my flat tappet vehicles.Like this stuff as it provides needed ZDDP protection for all of my flat tappet camshaft antiques. Item Reviewed: Racing Motor Oils
Great productI run a dirt track car so my oil sees extreme conditions with heat, cycles, and dirt. I use to change my oil after 3 nights out and would then send an oil sample off to get tested and they would come back with the oil is at the end of its life. I then switched over to this amsoil dominator 15-50 mid last year. I sent an oil sample off after 3 races and they told me the oil was practically new still. I then sent a sample off after 6 races and they said the oil its self was still good but recommend I change it because of high silicone (dirt) content in it. Item Reviewed: Racing Motor Oils
I use this item all the timeGreat protection from racing Item Reviewed: Racing Motor Oils
Drag racerI think is best stuff out there!!!! Item Reviewed: Racing Motor Oils
Best option for older carsAmsOil Z-Rod is by far the best oil for older engines that were designed to use motor oil with Zinc. I have used it for many years, and I've never had any issues. Item Reviewed: Racing Motor Oils
Z-RodThe best oil for my newly rebuilt 1963 Buick 215 Aluminum V8 Item Reviewed: Racing Motor Oils
Zrod 20-50Stays clean and never had a oil related failure Item Reviewed: Racing Motor Oils
excellent productI have used amsoil in my harley and cars as well for a few years now, U still remember the first time I used it in my twin turbo stealth. It ran much smoother and quieter. The same in my harley. This is the best oil in the market, I have tried others before Amsoil but nothing is better. Item Reviewed: Racing Motor Oils
Great oilI run a stroked 6.1 to a 6.6 Hemi 10.8:1 Compression. I need an oil that takes a pounding driving to work or doing some street racing. Very happy with Amsoil products. Item Reviewed: Racing Motor Oils
Pleasantly satisfiedI bought this oil primarily for the ZDDP in it. The engine (67' BBC) runs cooler and quieter. I would buy this again, but probably to 20w-50 vibe the 10w-30. Item Reviewed: Racing Motor Oils
Best stuff for my front wheel drive circle track racecar!I do asphalt circle track racing and Amsoil is all I use! When I'm cranking my car over 9000 rpms it's all I trust! Item Reviewed: Racing Motor Oils
Reliable, quality productUsing in an 87 Grand National built up with alcohol. Big turbo with 400 trans, run with this oil and have no complaints. Also have been using for years in 1960 Pontiac with 565 bow-tie block over 1350 horsepower with 1071 blower. Item Reviewed: Racing Motor Oils
It's oil!It lubricates as intended. Item Reviewed: Racing Motor Oils
YesGreat Item Reviewed: Racing Motor Oils
AWESOME productUse in our 602 Crate Sportsman Modified Item Reviewed: Racing Motor Oils
I TRUST Amsoil products!have used Amsoil products for last 20 years in cars, trucks, motorcycles and boats. Item Reviewed: Racing Motor Oils
hot rod oilI use it in many hot rod cars I work on. good stuff. Item Reviewed: Racing Motor Oils
best product for antique vehiclesvery good product, been using it for years Item Reviewed: Racing Motor Oils
Antique CarsAntique cars such as my 65 Vette needs oil made under different specs than today's cars. Amsoil ZROD is made from specs the manufacture required when these high compression engines were plus it has zinc Item Reviewed: Racing Motor Oils
Great productI have a 2015 Ram 1500. I have used the product after 5k miles and now have 45k miles. I change the oil every 10k because I am overly cautious. I am very pleased with Amsoil so far. It not scientific but the truck "feels like" it has more pep, and the engine is quieter compared to the factory's filled oil. Item Reviewed: Dominator® Synthetic 5W-20 Racing Oil (RD20)
AbsolutelyI'm a Ford fanatic and have built and Worked on 302s, both 351s, 4.6 DOHC and 4.6 PI , 4.6 3 Valve, 5.0s 5.8s 4, Valve as well as FE plus 385 series. I was using Royal Purple until it thinned out in my Coyote ! I just spend too much money along with a lot of time, effort and energy to use oil that going to cause me issues and premature failure! Tony Bogus!!! Item Reviewed: Dominator® Synthetic 5W-20 Racing Oil (RD20)
American made qualityAmericans have been harnessing and producing horsepower since the early 1900's, so who better to provide quality that protects our investments. I love pushing the envelope of power and Amesoil Company has proven themselves to provide oil and other products that keep me enjoying my rides. And still Making America Great!! Item Reviewed: Dominator® Synthetic 5W-20 Racing Oil (RD20)
Serviceclean longer,better oil pressure,runs cooler. Item Reviewed: Dominator® Synthetic 5W-20 Racing Oil (RD20)
Worth every pennyJust have my race bike motor rebuilt and i could've used the old bearings they looked immaculate. Item Reviewed: Dominator® Synthetic 5W-20 Racing Oil (RD20)
Only AmsoilI bought a 2000 Mustang GT 4.6l with 94,000 miles on it that might not ever have had an oil change. Amsoil brought it back to life and the pony intends to stay with me indefinitely. Item Reviewed: Dominator® Synthetic 5W-20 Racing Oil (RD20)
Best oil ever!I run this oil in a 2005 Ran with 35" tires and 6"lift towing a 20' enclosed trailer loaded for racing and actually seen a 2.5 mpg improvement. This engine spends a lot of time above 4K rpm driving up and down mountains. Item Reviewed: Dominator® Synthetic 5W-20 Racing Oil (RD20)
Best oil ever!I run this oil in a 2005 Ran with 35" tires and 6"lift towing a 20' enclosed trailer loaded for racing and actually seen a 2.5 mpg improvement. This engine spends a lot of time above 4K rpm driving up and down mountains. Item Reviewed: Dominator® Synthetic 5W-20 Racing Oil (RD20)
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T/A using synthetic oil
I use it in a 1979 Trans Am with the Pontiac 400 CI engine with 53K miles. Seems to hold great oil pressure from idle to high rpms. I have not noticed the leakage of oil associated with the change from conventional oil to synthetic oil.