Oil suggestions for 2021 1.5T GM Ecotech

Joined
Jul 14, 2020
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I thought looking at 100 deg viscosity was also a tell regarding fuel dilution. Doesn’t fuel dilution dramatically reduce it?
 

OVERKILL

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I thought looking at 100 deg viscosity was also a tell regarding fuel dilution. Doesn’t fuel dilution dramatically reduce it?
Yes, there are two mechanisms to viscosity loss:
- Fuel diution
- Mechanical shear

Historically, with most of the reports on this board coming from Blackstone, which doesn't measure fuel properly, it was blamed on the latter. It is only more recently where the impact of fuel has been more broadly recognized and we are starting to see folks with fuel issues trying other labs and discovering there's a LOT more of it than they thought.
 
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