Originally Posted By: KL31
Actually someone did find some boutique oils like bio syn? Resisted fuel dilution very well. Can't remember the name of it but there was a user spouting off about it and a number of things and people got sick of some of his comments. His UOA however did show some of the lowest dilution in a turbo DI car and he used a lab with GC testing.
Blackstone fuel numbers can't be trusted. If they say there's X amount of fuel, it's almost always way more and the viscosity does look really low. If the engine is port injected then something may be wrong.
I've been looking for details on how RLI is supposed to handle fuel better for a while now, but can't find the details. A few good threads can be found with a google search.
I like this from edhackett:
Quote:
The unsaturated aromatic hydrocarbons in the fuel react with the base oils and VIIs and permanently shear them. The sheared ends then oxidize. The oil is permanently damaged and can not be restored by getting it up to temperature. The damage does effect the ability of the oil to lubricate.
What you would see in UOA would be lower viscosity, lower HTHS, high oxidation, and rapid TBN depletion compared to an oil not subjected to excessive fuel dilution. Keeping the OCIs short is the only way to mitigate the effects of fuel dilution.
High quality HDEOs seem to be able to better withstand the effects of fuel dilution better than standard PCMOs.
From this thread:
https://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2752927
Some quotes in here from Terry Dyson:
https://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1308021
And I do not recall if there are more details about
how RLI is supposed to help in one of the original RS4 threads (haven't read through this lately):
https://bobistheoilguy.com/forums/ubbthreads.php/topics/1173821/1