AMSOIL Z-Rod 20W-50 allows my 406 blown engine to run smoother, cooler and with better oil pressure. I will now only use this oil in this engine. This engine is used a 41 Willys street rod. The engine now idles better and I feel is a more healthier oil to use in this performance engine.
best oil for me.
need to know what oil to use in my 1980 triumph t140egear box , 5sp?
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
z-rod 20w-50
By 
ARTHUR, 
a 
Verified Buyer 
on 
December 29, 2021
Just the perfect oil for my old flathead V/8 Ford. Great engine protection!
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Zrod 20/50
By 
THOMAS, 
a 
Verified Buyer 
from 
Long Island NY 
on 
December 27, 2021
Very convenient, don’t have to mix any additives, it’s all in there for my 64 Thunderbird!
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Comparison tests
By 
LYNN, 
a 
Verified Buyer 
from 
Washington state 
on 
October 16, 2021
I’ve watched a lot of oil test on YouTube and ams oil beat every other brand tested, some by a large margin- volitility, lubricity,cold flow, etc. Fast delivery was a plus.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Great for classics
By 
JOSHUA, 
a 
Verified Buyer 
from 
St Augustine  
on 
September 27, 2021
I noticed right away as soon I poured this in my truck even the color of it yells quality I’m very satisfied with it so far and I recommend
I have used Z-Rod 20W-50 in my 383 Stroker motor since 2014. This engine is on my Airboat and will often get run very hard for extended periods of time. The motor runs fantastic and does not use any oil. I would highly recommend this oil.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Classic car oil
By 
DAN, 
a 
Verified Buyer 
from 
Sauk Centre  
on 
September 14, 2021
Ordered the oil for my Classic Car within 2 days I had received it already. Definitely will order again
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
20W-50 ZROD
By 
ALEX, 
a 
Verified Buyer 
on 
September 07, 2021
First time using this oil and I'm glad I discovered this AMSOIL product. My Range Rover has a Rover V8 that really needs the Zinc additive to prevent excess wear. This seems to be doing the trick. I pulled the dipstick 1500 miles in and the oil still looks fresh and clear with only a slight darkening. I believe this is going to be my go to oil from now on!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Great for the 440
By 
Grant, 
a 
Verified Buyer 
on 
September 07, 2021
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
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