I've been using amsoil in my rotary motor for many years now and it has shown to hold up well to the heat the 13b produces. A recent engine refresh showed now signs of premature oil related wear.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
The last motor oil you will ever buy!!!
By 
Mike, 
a 
Verified Buyer 
from 
Rock Hill SC 
on 
March 05, 2019
I'm a trucker by trade and I was traveling through Pennsylvania when a Amsoil distributor passed me. What caught my eyes was the slogan, "The first in synthetic, the last motor oil you will buy." I got the distributor attention and he pulled into the rest area and to make a long story short, he placed his hand on his engine, I was completely shocked and sold. It is the best.
I do lots of stop and going here in town with my 2011 F150. Give it a try, you'll see and feel the difference with the performance
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Perfect for My Purpose
By 
Bassman, 
a 
Verified Buyer 
from 
New Britain, CT 
on 
March 01, 2019
Every spring I use Signature Series in my cars and motorcycles. Before the next spring the cars will need 1 to 2 quarts added. The XL oil provides an economical answer to a short term need.
For years now I have used Amzoil. The Jeep I have has a high performance Chevy 350 that had cooling issues. A few times it went well above normal temps. The oil did not break down, no damage was done to the engine.
Amazing oil! Has troubles with my silverado having lifter tick when it was cold out. After I used this oil and the amsoil filter,the tick went away and has not come back at all even on the coldest wisconsin days! Definitely shocked and amazed
I visited your booth at a Goldwing Rally and signed up. I used the Motorcycle 10W 40 in my Valkyrie and it shifted so much better and over 5k miles it didn't change. Made a believer out of me. I have 3 motorcycles, 2 cars and a conversion van. Using Amsoil in all of them.
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