I did my first lab test with our 22 Hyundai Tuscon. The analysis report came back with everything looking good. The main reason for the OA was because the oil had a strong gasoline odor when I had checked it. Plus the car is still within the warranty period and I know GDI engines can suffer from oil dilution. This was my first DIY oil change since Hyundai gives X amount of free ones after purchasing. I like to keep my intervals between 3-4K miles, not the 6-8K Hyundai recommends when they are footing the bill for a oil change. What surprised me was the percentage of fuel present in the oil was just a trace, despite what I thought was rather strong. So my question is, would such a small amount of gasoline in the oil have such strong odor?
Fuel in oil analysis
- Thread starter reaperman
- Start date
Based on the wear metals, even if you have fuel dilution, it isn't causing excess engine wear.
Of course, there are some here that totally dismiss wear metals in the oil as a gauge of engine wear. Anyway, there isn't a whole lot you can do to reduce the effects of fuel dilution given your short change interval. Maybe move to 0/5W-30, if you are really worried. Personally, I'd just keep doing what you are doing.
Of course, there are some here that totally dismiss wear metals in the oil as a gauge of engine wear. Anyway, there isn't a whole lot you can do to reduce the effects of fuel dilution given your short change interval. Maybe move to 0/5W-30, if you are really worried. Personally, I'd just keep doing what you are doing.
If you still have some you can send to Oil Analyzers or other you can ask for Gas chromatograph test on it.
My daughter-in-laws short tripped '21 Tucson, Blackstone said the same thing, except estimated higher fuel. The raw fuel smell was nauseating and in my drain pan all the oil was "separating" in spot on pan, not leaving a film. Others here said that was the fuel. I have her on a 3k/6 month OCI now for last couple changes. Much better looking/smelling but have not retested it. I use 5W-30 in hers now also based on the initial results.
Here is a Blackstone vs Oil Analyzers from my short tripped Pilot. https://bobistheoilguy.com/forums/threads/blackstone-vs-oil-analyzers-pp-euro-l-5w-30-5175-miles-19-pilot-67k-miles.392379/
My daughter-in-laws short tripped '21 Tucson, Blackstone said the same thing, except estimated higher fuel. The raw fuel smell was nauseating and in my drain pan all the oil was "separating" in spot on pan, not leaving a film. Others here said that was the fuel. I have her on a 3k/6 month OCI now for last couple changes. Much better looking/smelling but have not retested it. I use 5W-30 in hers now also based on the initial results.
Here is a Blackstone vs Oil Analyzers from my short tripped Pilot. https://bobistheoilguy.com/forums/threads/blackstone-vs-oil-analyzers-pp-euro-l-5w-30-5175-miles-19-pilot-67k-miles.392379/
Last edited:
My Opinion: keeping in mind this was a short interval. If the OP wants to extend to a 5000 or 6000 mile interval.. a thicker oil such as a resource conserving 5w30 is a good idea.
it would be a 20wt after 2500 miles.
The flashpoint and viscosity indicate that there's quite a bit of fuel. I'd say somewhere in the range of 3 to 5%. It shouldn't go any higher on a longer OCI, so you shouldn't be concerned about doing your 4k intervals. Everything looks good otherwise.
This was Blackstone on her Tucson. If they got 3.8% I can just imagine what OAI would have tested. I also like take it for a long highway drive before next test. Great that would be false numbers because sample was from how it was being used everyday and why I shortened interval with better oil.
The UOA looks very good but it's been mentioned that BS doesn't use one of the better ways to calculate fuel. Oil Analyzers or some others that do Gas Chromatography is what you want. As for the gasoline smell, any amount of gasoline puckers the nose for me. It is a strong odor no matter the amount. Since you don't run long intervals there really isn't much you should do differently.
Similar threads
