My name is Michael(23), I have a 2012 Mazda 3I Skyactive 2.0 with 235,000 miles. 150,000 of those miles were from Uber and the rest was standard city/highway driving. I have a problem with gasoline in my oil and it’s getting worse. I’ve heard you say multiple times what the problems could be but you never say how to diagnose the problem. If you could please do a video about it that would be great but I bet that video will be pretty long. I do not want to have to pay a mechanic if I don’t have to. It’s a two car owner, me and my dad, and we took very good care of it changing the oil every 5000 miles. But since there has been so much gasoline in the oil I change it every 3000 miles or less and I’ve been doing that for maybe two years now. I just changed the spark plugs and they were very clean and slightly corroded. I don’t think it’s a head gasket problem because there is no water in the oil, just gasoline. I hope to see this On the channel! I love your videos and your personality! Thank you!
This is usually a result of blow-by.
You could try an oil system treatment and see if that might restore some function to the piston rings, but other than that I don't think there's much you can do. It's got high mileage now, and it's a small engine. They just wear out.
Those Skyactiv engine also suffer from carbon building as a result of the direct injection system. You could try giving it a valve and intake system blasting and see if that helps any.
Oil dilution is a lot more common with DI engines because the fuel is injected at thousands of PSI. Short trips make this worse, so make sure you take it for a good long, hard drive regularly so the heat can evaporate the contaminants.
How do you know or suspect there is gas in the oil?
