Use in my Street Rod, ZZ-4 increased oil pressure at idle some 15 lbs. Have previously used in a Corvette that I road raced, great product. After engine tear
down and really beating on the car engine 4000-5500RPM's for some 15 races no bearing wear what so ever dont wasted your $$ on other products, firm believer in AMSOIL
I run this oil in my older daily driver because of the high amount of ZDDP in this oil. Great product with great shipping department. I ordered on a Wednesday, and I had my oil on Friday!!!
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Great for flat tappet engines, old American engines
By 
KEVIN E, 
a 
Verified Buyer 
from 
Clayton, NC 
on 
April 21, 2021
With the higher amount of Zinc additives (ZDDP ), this oil is a "must use" for engines with flat tappets.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
4 star rating
Expand the product line
By 
GARY, 
a 
Verified Buyer 
on 
March 29, 2021
Great oil, but would like to see the line expanded to include single 40w, 50w or 60w.
great for my vw aircooled. i am a premium member but, at 100 dollars for free shipping, i shy away. if it was 50 like it was one time only, ild order each month.
By 
JAMES, 
a 
Verified Buyer 
on 
November 23, 2020
Great product. Tried and true. I changed my oils and ended up parking my car for 3 years. Checked my oil and it was in great condition and the motor runs fantastic for a 13 year old block
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
By 
DOUGLAS, 
a 
Verified Buyer 
on 
November 16, 2020
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
By 
ARTHUR, 
a 
Verified Buyer 
on 
November 14, 2020
Z-Rod 20W50 is perfect for my 1939 Ford flathead V8 engine. Easy start up and even lowers engine temps and better oil pressure than the 30W Oil that was the norm a long time ago! Great product.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Use for my Boat
By 
DO, 
a 
Verified Buyer 
from 
Long Island 
on 
October 15, 2020
I use this for my boat. It runs great and seems to run cooler than with other oils. The high zinc is good for the marine engine.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Top quality
By 
John, 
a 
Verified Buyer 
on 
September 21, 2019
Use this in my Jaguar. Outstanding!
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5 star rating
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
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