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AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

 Z-ROD 20W-50 Synthetic Motor Oil (ZRF)
Product Code: ZRF • Brand: AMSOIL

AMSOIL 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.

Package sizes include:

1-Quart Bottle
1-Quart Bottles (case of 12)

See Pricing or Place an Order
MSDS Data Sheet

Product Details

Product Applications

AMSOIL Z-ROD 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.

Product Description

AMSOIL 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.

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 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

AMSOIL 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.

COMPATIBILITY

AMSOIL Z-ROD 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.

SERVICE LIFE

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 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.

HEALTH & SAFETY

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).

Click here to view the MSDS Data Sheet for AMSOIL ZRF.

Keep out of the reach of children. Don't pollute. Return used oil to collection centers.

Technical Data

TYPICAL TECHNICAL PROPERTIES
AMSOIL Z-ROD 20W-50 Synthetic Motor Oil (ZRF)
Viscosity @ 100°C, cSt (ASTM D445)19.2
Viscosity @ 40°C, cSt (ASTM D445)136.2
Viscosity Index (ASTM D2270)161
Flash Point °C (°F) (COC) (ASTM D92)244 (457)
Fire Point °C (°F) (COC) (ASTM D92)262 (486)
Pour Point °C (°F) (ASTM D97)-40 (-40)
NOACK Volatility, % weight loss (g/100g) (ASTM D5800)4.8
High Temperature/High Shear Viscosity
@ 150°C, 1.0 X 106 s.-1), cP (ASTM D5481)
5.1
Four-Ball Wear @ 40 kgf, 75°C,
1200 rpm, 1 hr, scar diameter, mm (ASTM D4172)
0.36
Total Base Number (ASTM D2896)9.0

 Z-ROD 20W-50 Synthetic Motor Oil (ZRF)

Did this product meet your expectations?

(click on a star to rate)

Product Name: Racing Motor Oils
Current Rating: 4.76 out of 5 stars
Votes & Reviews: 51 vote(s) and 66 user reviews.


A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Army dude: space

Awesome motor oil

I 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
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bayman: space

Good stuff

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.

Item Reviewed: Racing Motor Oils
Discussion Url

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Self proclaimed Amsoil fanboy: space

Zinc for flat tappet engines

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.

Item Reviewed: Racing Motor Oils
Discussion Url

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Lane with the big block camaro: space

The only oil I'll buy from now on

I 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
Discussion Url

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by 1_wikd_v: space

Great product always reccomend it

Inuse it for my tranny and motor oil

Item Reviewed: Racing Motor Oils
Discussion Url

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Max: space

Great oil

I think this is the best oil for my '68 Firebird.

Item Reviewed: Racing Motor Oils
Discussion Url

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tominator: space

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
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by E63 amg: space

I will buy again

Absolutely love the quality of amsoil!! I use only the best on my motors!

Item Reviewed: Racing Motor Oils
Discussion Url

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bushmaker: space

Most DEFIANTLY BUY AGAIN

Product 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
Discussion Url

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Sunny D: space

Great oil

Love this oil for my supercharged car with 180k miles.

Item Reviewed: Racing Motor Oils
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