Ive finally decided to try HPL oil in my truck and extend my oil changes a bit. 3.7 Cyclone currently sitting at 233k miles, super small leak from the valve covers at the VVT solenoid grommets, no level drop on dipstick. Id like to stick with 10W30, been using it awhile, not sure if I should go with the No VII 10W30 or the diesel CK-4 10W30. Id like to go 7-8k between changes.
I currently have Amsoil 75W140 in the rear end with 30k on that fluid. Ill change it in another 40k at 273k unless its good to go longer. I rarely tow anything. I was considering HPL 75W140. Are their gear oils good?
Are the above mentioned oils API certified, and if not, does it actually really matter?
I currently have Amsoil 75W140 in the rear end with 30k on that fluid. Ill change it in another 40k at 273k unless its good to go longer. I rarely tow anything. I was considering HPL 75W140. Are their gear oils good?
Are the above mentioned oils API certified, and if not, does it actually really matter?