Maybe not for your vehicle, but your blanket statement for all vehicles is arguable.
2020 Acura RDX, Valvoline 5-30 R&P, 4500 miles
- Thread starter GW208
- Start date
My statement is for 2.0T Honda engine, which is what this thread is for.
I was going by miles.
It's been my experience also that highway miles don't help with the fuel dilution. This sample was taken after an 800 mile road trip that was at least 95% highway miles. The morning after getting home I drove the car around the block and then drained the oil and took the sample.
When I change the oil and filter, a 5 quart jug will bring the level to midway between the add and full marks. It then takes less than half a quart to bring it to the full mark which is where I run it.
At the time of my previous sample to Oil Analyzers I also sent a sample to Blackstone to compare. Oil Analyzers came back with greater than 5% fuel while Blackstone showed just a trace. The viscosity was down about the same at both labs. This was expected from reading here at Bitog.
This where I get confused though.
If we go by the drop in viscosity it seems like OA is more accurate but going by the dipstick it seems Blackstone is more accurate if I'm looking at this right. Am I correct in thinking that 5% fuel in the oil would be an extra quarter of a quart in the sump? If so, I'm quite certain that I would be able to see that on the dipstick but the level never changes between OCI's. Also, if we expect getting the oil up to temp and keeping it there on long highways drives will burn off some fuel it seems like we should be able to see a change on the dipstick before and after the trip?
One last thing, my wife thinks I'm crazy but I've asked her to smell the used oil a couple of times and neither one of us can detect any gas odor at all.
When I change the oil and filter, a 5 quart jug will bring the level to midway between the add and full marks. It then takes less than half a quart to bring it to the full mark which is where I run it.
At the time of my previous sample to Oil Analyzers I also sent a sample to Blackstone to compare. Oil Analyzers came back with greater than 5% fuel while Blackstone showed just a trace. The viscosity was down about the same at both labs. This was expected from reading here at Bitog.
This where I get confused though.
If we go by the drop in viscosity it seems like OA is more accurate but going by the dipstick it seems Blackstone is more accurate if I'm looking at this right. Am I correct in thinking that 5% fuel in the oil would be an extra quarter of a quart in the sump? If so, I'm quite certain that I would be able to see that on the dipstick but the level never changes between OCI's. Also, if we expect getting the oil up to temp and keeping it there on long highways drives will burn off some fuel it seems like we should be able to see a change on the dipstick before and after the trip?
One last thing, my wife thinks I'm crazy but I've asked her to smell the used oil a couple of times and neither one of us can detect any gas odor at all.
I've noticed this as well.
Thanks for posting a restore and protect analysis.
It looks a bit better than Advanced! Seems like a great report outside the Acura GDI fuel dilution, that appears to be the norm!
It looks a bit better than Advanced! Seems like a great report outside the Acura GDI fuel dilution, that appears to be the norm!
If trying to measure fuel dilution, wouldn't "drive it around the block" prior to a UOA sample. That's a cold engine running rich...which is one of the big reasons for fuel dilution. I'd prefer to get a sample after a highway run, hot, THEN change the oil. Second choice would be cold and let it drip a long time.
That's what I thought too. I try to take it for at least a 15 mile drive just before draining and sampling.
I thought of that but I didn't think less than half a mile could add enough fuel to the oil to make a measurable difference?
It won’t.
