Gas Direct Injection & Oil Change Interval
I have run a couple of Blackstone reports on my oil from the truck in my signature. No issues, metals look fine, but the fuel dilution is up to 2.3% and there is a related drop in viscosity at 5,000 m...
Forum Discussion
naturist wrote:
I believe gas engines typically require a "rich" fuel mixture for warm up, so perhaps your short commute for work is the culprit here. I also know that a lot of short trips is bad for all IC engines, regardless of fuel type for a number of reasons.
Yes, I think this is a contributor as the fuel does not get the opportunity to 'cook off' when the engine is running cold. I was speaking with an aircraft mechanic (A&P) who told me older radial engines would dump some fuel in the oil when they shut down to reduce the viscosity for easier startup. The fuel would then burn off when the engine was started again and was run at operating temperature.
The reason I was looking in the first place is from various posts I have seen on other forums from folks running gas direct injection engines (various makes) noting some level of fuel in the oil.
