☰
Shop by Vehicle
Find AMSOIL Near You
Open full size product Z-ROD® 20W-50 Synthetic Motor Oil
Roll over image to zoom in
Roll over image to zoom in

AMSOIL Z-ROD® 20W-50 100% Synthetic Motor Oil

Product code : ZRFQT-EA

5 star rating
Read 23 reviews
Read 23 reviews

  • Engineered for classic vehicles
  • Helps retain horsepower
  • High-zinc formula protects flat-tappet cams, lifters, rockers & other critical components
  • Protects against rust during storage
Product Overview

AMSOIL Z-ROD® 20W-50 100% Synthetic Motor Oil



Specially engineered for classic cars. Contains high levels of ZDDP, top-tier additives and rust inhibitors to protect your passion, deliver maximum performance and keep your classic engine free of rust and corrosion in storage.

See the Product Data Bulletin for full details.

PROTECTS FLAT-TAPPET CAMS

  • Formulated with high levels of ZDDP to protect flat-tappet cams, lifters, rockers and other areas susceptible to wear.
  • High-zinc, high-phosphorus formulation provides the extra wear protection critical splash-lubricated components require.
  • Fights wear to help prevent compression loss for maximum horsepower.

HELPS PREVENT RUST & CORROSION

  • Formulated with a unique blend of rust and corrosion inhibitors to ensure maximum protection during long-term storage.
  • Prevented rust and corrosion in industry standard testing (ASTM D1748-10) for excellent engine protection.

Z-ROD Delivers Superior Rust Protection

In industry standard testing, AMSOIL Z-ROD completely prevented rust formation while a leading competitor did not.A

AMSOIL Z-ROD completely prevented rust formation while a leading competitor did not.

ᴬ Based upon in-house testing of AMSOIL Z-ROD 10W-40 and a leading competitor obtained on 7/25/2019 in ASTM D1748-10.

See the Product Data Bulletin for full details.

Technical Specification

AMSOIL Z-ROD® 20W-50 100% Synthetic Motor Oil

Data Bulletin

Warranty

SDS



Product Reviews

AMSOIL Z-ROD® 20W-50 100% Synthetic Motor Oil

5 star rating
Based on 23 reviews
Based on 23 reviews
See all customer reviews
  • 5 star rating
    AMSOIL Z-ROD® 20W-50 100% Synthetic Motor Oil
    By  ZEKE,  a  Verified Buyer  from  California  on  December 01, 2024
    Love this for my vintage 1960s British car. Would one hundred percent recommend the Z-Rod oil to anyone who wants a little more measure of engine protection.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Quality
    By  BOBBY,  a  Verified Buyer  from  Palm harbor Florida   on  November 30, 2024
    Use this religiously and my classic muscle car lower the operating temperature by 5° and the car ran much better will never use anything but their products in all my vehicles
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Z-Rod review
    By  ARNOLD,  a  Verified Buyer  from  Michigan  on  November 15, 2024
    I've been using the 10W-40 for two seasons in my 1969 Mustang and I watch the oil pressure gauge, especially when the ambient air temps increase beyond 80 degrees F. Oil pressure hasn't decreased since I started using it, even at sustained freeway speeds. I'm very satisfied.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Street rods deserve only the best!
    By  MIKE,  a  Verified Buyer  from  Gainesville, Ga.  on  November 02, 2024
    Both my street rods have used Z_ROD oil since day one. They are not those "Kit cars' but real steel cars! You put that much time and money into you cars they only deserve the best oil!!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great Service.
    By  ED,  a  Verified Buyer  from  Georgia  on  October 22, 2024
    The products were shipped in a timely manner, and packaged well. Will be ordering again when I need more.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    20W-50 Z-ROD Motor oil
    By  ROY,  a  Verified Buyer  from  Sapulpa Ok  on  April 28, 2024
    Used this oil for the hydraulics in my SCAG riding lawnmower. The higher zinc is better for that application. I only use ANSOIL in all my applications.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Best product
    By  CORY,  a  Verified Buyer  from  Sellersburg Indiana   on  April 17, 2024
    Best brand of oil, I use it in all 3 of my vehicles.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great Oil
    By  MICHAEL,  a  Verified Buyer  from  Louisiana   on  April 13, 2024
    Just what the whipple supercharged 68 Camaro needed. Using the best is what it needs!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Always Good Services and Fast Shipping
    By  ERIC,  a  Verified Buyer  from  Quebec City  on  April 09, 2024
    Always Good Services and Fast Shipping Thanks...
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Z-ROD 20w-50 the Best!
    By  MONTE,  a  Verified Buyer  from  California  on  January 14, 2024
    Using this oil in my vintage English car. Wanted a high zinc oil to help mitigate wear on start-up since the car sits for a week or two between trips. The combination of extra zinc with a fully synthetic base is great. The start-up and running protection of this oil are fantastic.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?