Z-ROD® 10W-30 Synthetic Motor Oil

The high ZDDP Formulated Motor Oil to solve that age old question “What oil should I use in my classic car?”

Modern Technology For Classic Cars

Z-ROD® 10W-30 Synthetic Motor OilAMSOIL Z-ROD Synthetic Motor Oil is specially engineered for classic and high-performance vehicles. It features a high-zinc formulation to prevent wear on flat-tappet camshafts and other critical engine components, along with a proprietary blend of rust and corrosion inhibitors for added protection during long-term storage. Z-ROD Synthetic Motor Oil is designed to perform on the street and protect during storage.

AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, the First in Synthetics®, to do the best job protecting your engine.

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Buy in the Omaha store at 84th & G or use this Online link to the 10W-30 sales page if you are outside of the area. There’s not much more I can add to this one as it says it all so well here but our Omaha customers often mention other products they add a ZINC additive to enhance it for their early model car but why go through that motion when we have this and several other high zinc products which have other superior aspects such as the highest quality seal conditioners, corrosion resistance which is an exclusive trait to AMSOIL products and the performance which keeps customers coming back!

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Protects Flat-Tappet Cams

The lifters and cam lobes on flat-tappet camshafts common to classic and high performance vehicles slide rapidly against one another, producing high friction and heat. The friction between the two components can eventually wear down the cam and affect valve operation, ultimately resulting in lost engine power and reduced efficiency. In addition, these areas are splash-lubricated rather than pressure lubricated like other areas of the engine, which adds extra strain on anti-wear additives like the zinc and phosphorus in zinc dialkyldithiophosphate (ZDDP).

AMSOIL Z-ROD 10W-30 Synthetic Motor Oil is formulated with high levels of ZDDP to protect flat-tappet cams, lifters, rockers and other areas susceptible to wear. Its high-zinc, high-phosphorus formulation provides the extra wear protection these critical splash-lubricated components require.

Provides Long-Term Protection from Rust & Corrosion

z-rod-rust-humidity-cabinetAMSOIL Z-ROD Synthetic Motor Oil is formulated with a unique blend of rust and corrosion inhibitors to ensure maximum protection during long-term storage. To prove its effectiveness, AMSOIL submitted Z-ROD Synthetic Motor Oil to the Standard Test Method for Rust Protection in the Humidity Cabinet (ASTM D-1748). This test evaluates the rust-preventative properties of oil under high-humidity conditions, similar to those faced by a covered hot rod in a damp garage. The metal coupon treated with AMSOIL Z-ROD Synthetic Motor Oil showed no signs of oxidation after 192 hours, while the coupon treated with a leading competitor’s product failed the test after 24 hours.


AMSOIL Z-ROD 10W-30 Synthetic Motor Oil is recommended for older or modified engines requiring either 10W-30 or 20W-50 motor oil. Z-ROD Synthetic Motor Oil meets API SL and earlier specifications, allowing for increased levels of anti-wear additives. ZDDP levels in Z-ROD Synthetic Motor Oil exceed the limits of API SM and newer specifications.


AMSOIL Z-ROD 10W-30 Synthetic Motor Oils are compatible with conventional and other synthetic motor oils. Mixing AMSOIL Z-ROD Synthetic Motor Oils with other oils, however, will shorten the oil’s life expectancy and reduce the performance benefits. Aftermarket oil additives are not recommended for use with AMSOIL Z-ROD Synthetic Motor Oils.


Because engines in classic cars, hot rods and other performance vehicles are generally modified, a universal oil drain interval recommendation for these applications cannot be given. Responsibility for determining the drain interval duration rests with the owner. As a general service guideline, the maximum drain interval for Z-ROD 10W-30 Synthetic Motor Oil should not exceed 5,000 miles or one year, whichever comes first. In heavily modified engines (e.g. forced induction, nitrous) the maximum drain interval should not exceed 3,000 miles or one year, whichever comes first.

For warranty information, visit AMSOIL Warranty Information



I will buy this oil again, it is the only oil to use
By  Eric,  a  Verified Buyer  on  July 18, 2019
I 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.

Best oil
By  Stephen,  a  Verified Buyer  on  August 19, 2019
Great oil for my 60 yr old car, I also amsoil in modern cars better fuel mileage

Best product for my application
By  454_Burban,  a  Verified Buyer  from  Florida  on  February 10, 2019
I 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.
Pretty much the best racing oil out there!
By  Vinny,  a  Verified Buyer  from  Birmingham, AL  on  February 07, 2019
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!
Good for Old Jeeps
By  CharlieB,  a  Verified Buyer  from  Thornton, NH  on  March 10, 2019
I use this product in my 1952 M38A1 Willy’s Army Jeep The engine runs quiet and smooth with this oil
Zinc for flat tappet engines
By  Self proclaimed Amsoil fanboy,  a  Verified Buyer  from  Iowa  on  December 08, 2018
I 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.
Good stuff
By  Bayman,  a  Verified Buyer  from  Kansas City Missouri  on  December 26, 2018
Seems to keep the engine purring smoothly even after “getting on it” once daily driven now weekend fun car – 2005 Subaru STi Motor built by Andrew Ashman of OKC Tuned by him as well.