Lowest TBN for E-85?

Joined
Nov 11, 2020
Messages
61
Location
Florida
Hey all, as I understand it, vehicles running E-85 require more frequent oil changes.

What is deemed a safe TBN in an oil before it should be changed? Trying to figure how long I could stretch the OCI.
 
TBN < 1.0 you want to change. Fuel dilution is your proper measure here. If you do an oil sample it should give you fuel dilution amount.

Just my $0.02
 
I only run E85 now and the oil stays way cleaner than on gas. It can be misleading as fuel dilution is greater since the engine runs richer. I was on the Driven Racing Oil website at the instant and they state somewhere to use a thicker oil if you run E85 because of fuel dilution. I tend to only use 40 grade oils now just to be extra safe.

 
Back
Top