Sierra, SAE 30 Full Synthetic Oil (5 Quart), 18-9410-4

Cheapest synthetic option for my boat. Good product.

I've used this oil for years in my Volvo Penta 5.0L. But these 5-stars are mostly for the supplier, Neobits. The listing says you're buying a 4-pack, but only 1 container arrived. After calling Amazon CS, Neobits got right back to me, explained that it was a listing error and refunded my full purchase price, no questions asked, while I got to keep the 1 container I got. Thanks, Neobits!

If you don't mind paying $.34/oz, and NOT the $.09/oz shown on the listing, then I expect you will probably be satisfied with this product. The trouble is that when the listing indicates you get a "4 pack" of "5-quart container", I expected to get that

good quality oil at a decent price

I have a few older gasoline engines that require 30 wt oil. These air cooled engines work hard and I think they will benefit from 30 wt synthetic oil. I can tell that my generator runs cooler with this oil. It is very hard to find 30 wt synthetic oil and I was very pleasedifficult to find a high quality oil from Sierra on Amason.

Not a 5 quart - 4 pack. Only received one 5 quart jug when it clearly says 4 pack.

Its oil.... thats about all I know... price was right, specs are right, engine has not blown up yet.

This is really good oil and exactly what I'm looking for for lawn mowers Etc