I've used it for the last 3 years. Put it in every gas motor I own. Motorcycle, Mower, chainsaw, weedeater even the 2-stroke 3 wheeler. Works great.
I put it in every truck I own. Put it in the 79 k5 and it sat for a year and a half behind the garage. Put in a fresh battery, pumped the gas about 10 times, fired right up. No joke.
They also make an additive called Trans Tune. My 89 was slow to go in reverse. Poured in a bottle and shifted great. Of course then I had the tranny flushed two weeks later.
Thier areosol Deep Creep is Ok. I like PB Blaster better, but its better than WD-40.
It also works as a gas stabilizer if you planning on storing our vehicle.
Hope this helps
Bruiser
Oh yea, My local NAPA stocks it. They order 4 cases a week. Can't keep it in stock.
Trev1981, I'll look on the can , I think it said " Any combustion engine" But I havn't tried it in a diesel. I'll look and let you know.