Customer Ratings & Reviews

I'm a preferred customer for Amsoil so you know I'm educated on oil products any product Amsoil has will be an over the top product choice!!!! I have been building street rods and custom cars for 64 years now and now building my last one new LS engine so Amsoil break-in oil for sure my choice!!!!!!

The product shipped pretty quickly, so that was nice to be able to get the oil very fast. The product seemed to do its job in the Toyota 86 we own, that just last year got a new engine installed. The product is a tad more expensive than the regular oil, but you are getting a thinner higher quality oil.. so in my opinion it is worth the buy for a new engine. We have nothing bad to say about this product thank you AMSOIL

Great for breaking in rebuilt and built motors, especially when you’re adding performance parts.

Highly recommend

Always a good and smooth experience with amsoil. Only thing I run in my performance engines and slowly changing over my daily’s to amsoil.

I'm always nervous breaking in flat tappet cam and this oil eased my mind and did its job perfectly. In extremely happy with the results and so is my customer.

Amsoil is the best oil I’ve ever used. This is the 5th engine I’ve built using amsoil break in oil and have great results in all of them. Rings, seals seated well on all of them. Great oil pressure. I recommend to everyone in this field of work you won’t regret using amsoil.

Great product… slick but sticky and stays on parts. Used this product when I was building my 1987 Jeep Wrangler 258 I6 engine and it needs high zinc oil. Going to follow up with their Amsoil Z-Rodd for the life of the engine. Built with Amsoil, Runs on Amsoil. 🤙

If you build engines and you want a oil to protect your build and break in your masterpiece. This is it

Works as described for engine break in recommended.

The absolute best break-in oil to use in a newly rebuilt engine!

I used this in a new LS motor and it seems to be working out great! I used it in a big blaick perviously and had no issues as well!

Great oil and fast shipping!

Highly recommend this product for any new motor break in, it was highly recommended to me for my XC ATV

Used this oil for breaking in my 5.3 build. I wouldn’t use anything else. Especially for such a critical procedure.

Has added zinc which is great. Good for fully breaking in small engines also. I like that it's red in color so you can check it to make it's not getting too dark.

I ran my engine with the amsoil break in oil and my motor is breaking in very well... I had to remove my motor to swap parts to put in a different vehicle and everything is breaking in perfectly.

I have reviewed the specifications of several oils for my new Pontiac 455 GTO drag engine (1967 GTO) I have decided on Amsoil for break-in. The engine is a non-roller 12.5 compression unit with a high lift cam so proper break-in is critical.

I used amsoil sae30 break in oil while restoring my vintage motorcycle I bought back in college. It’s working great!

Great product for breaking in you new build I recommend to anyone with a rebuild