Gas smell coming from the oil

Asked by GuruC4JV9 Jan 31, 2019 at 06:54 PM about the 2004 Lexus RX 330 FWD

Question type: Maintenance & Repair

Why do I smell gas in the oil. And how do I remedy
the problem?

4 Answers


Check the PCV system for proper operation first. Other possibilities are leaking injectors or a leaking fuel pressure regulator, as that is the only way fuel can be getting into the crankcase, a fuel pressure bleed down test will need to be performed to verify either one or both problems. When was the last oil change?

1 people found this helpful.

The oil was changed about 3months ago. My mom probably put 500 miles in those 3 months. Its not driven much.

Thank you tennis shoes. Very helpful and appreciated.


Ok that might be the whole problem not getting driven enough, if the engine rarely gets to operational temperature it can’t burn off excess fuel vapors that get passed the rings during just normal starts and stops, and cold weather just aggravates the problem as the computer runs the system richer longer that it would in warmer temperatures. So check the PCV system and fix it if it’s not working right, then change the oil and filter, it should be changed every three months anyway if your still using conventional oil. At least once a month the vehicle should be warmed up throughly and then driven at highways speeds for at least 45 minutes. If that doesn’t help then go for testing for internal fuel leakage tests.

1 people found this helpful.

Your Answer:

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