Engine oil Shell or AMSOIL

Shell Rotella T6. It's marketed as heavy diesel oil, but it meets the exact same specs as mobil 1 full synthetic and just has some extra detergent like diesel oils do.

This oil in OG 9-3 that have the crankcase retrofit kits clean the entire engine very well after a few oil changes getting rid of and preventing any sludge issues. The oil even eliminated some nasty tappet noise due to low oil pressure in my 2002 9-3 after a few seconds when I bought it.

I’m using Amsoil Signature oil.

Yesterday I took my car in for an oil change and got amsoil. I read countless comments of people hating on the price, this and that, but let me tell you somthing, that amsoil ain't a gimmick or a rip off. My car drove sooooo much better afterwards, it kinda shocked me. Smoother, seems faster, more. Consistent shifts, just left me feeling like she felt the best version of herself.

I just hit 19k miles on my 2017 390. I ride it like someone stole it. Also thousands of high revving miles on the highway.

I use nothing but Rotella T6 15w-40. It is really good oil and it is cheaper than almost anything else you can use.

Shell Advance Ultra - yung full synthetic. Mahal pero worth it. I change oil every 2.5k - 3k max.

Go with ams oil I use to talk mad shit about the product but honestly I’m pretty satisfied with it because Harley’s syn 3 is just become trash leaving lifters ticking on and the bike has always had the Harley tick but it has quieted it all down. Just my opinion though..

I use Amsoil in all three, but I use their VTwin kit for my M8. Different trans, primary and engine oils.

I was absolutely amazed at how much smoother and more responsive the bike was.

I have been using Shell Rotella T5 for decades in big v twins. Currently 1900cc Statoliner.

Ams oil, yes it's overpriced but it is the best and going from stock HD fluids in the primary and tranny it does shift noticeably quieter and it's much easier to find neutral

Suggested I change oil from Castrol Syntec to maybe Royal Purple or Amsoil.