retuks
Member
- First Name
- Jared
- Joined
- Aug 6, 2018
- Threads
- 1
- Messages
- 20
- Reaction score
- 9
- Location
- Oahu
- Vehicle(s)
- 2018 Civic Sport Hatchback 6sp. 93 Supra Turbo 6sp. Getrag 6766 turbo E85 / 750whp. 97 240sx 5sp.
- Thread starter
- #1
The first thing that came to mind after reading this forums' and the webs' countless threads of woe and uncertainty was the simple question of "wouldn't you be able to just vent it off while the car isn't running?" So I have taken a scientific approach to deal with the inherent fuel oil dilution in my spare time at my workshop.
What I have found is rooted partly in common sense but also comes with it's own headaches if practiced by owners of this vehicle; pulling out the dipstick an inch or 2 - just enough to expose the sump to air outside - and removing the oil cap after a drive. The latter isn't necessary but it's another way fuel could evaporate off oil that's already mixed in and distributed through the head side of the engine immediately after operation while it's nice and hot and the opening is a lot wider than the dipstick channel.
To test this theory, I took 3 bottles. Filled the first to 1/3 liter of 0w-20, marked it's level on a flat surface, then poured 1/3rd of that amount of 92 octane into the oil, mixed it up and took a measurement of the new higher oil level and set the clock at 1220 when i did so and let it sit with the cap off. For a control subject to test how well fuel evaporates at all on it's own, I took another bottle and filled with 1/3 liter of just 92 octane, marked, timed and let that sit with it's lid off in tandem to the diluted oil to monitor both rates of evaporation over an 8 hour period. The last bottle i filled with 1/3 liter of pure 0w-20 and did the same procedure just to be sure oil couldn't evaporate on it's own either. All bottles were tested indoors with plenty of ventilation between 72-76 degrees F. relative humidity 85%.
After the 8 hour period, I could clearly see the fuel bottle 3mm below it's original line. definitely evaporating at a decent rate. The diluted oil wasn't evaporating as quickly at nearly 2mm below the marked line, but nonetheless it was definitely decreasing as the fuel separated from the oil and vaporized out of the bottle. The pure oil bottle did not stray from it's mark at all just as suspected.
This in practice has a user error risk to it - forgetting to seal your dipstick and oil caps before setting off each morning, or critters getting inside if you live in a wildlife infested area. But for the competent individual who doesn't mind adding a (albeit unnecessary) ritual to their daily routine after going to and coming home from work and parking your car for long periods of time, this could be a viable way to combat the dilution problem until honda can find a more permanent fix.
What I have found is rooted partly in common sense but also comes with it's own headaches if practiced by owners of this vehicle; pulling out the dipstick an inch or 2 - just enough to expose the sump to air outside - and removing the oil cap after a drive. The latter isn't necessary but it's another way fuel could evaporate off oil that's already mixed in and distributed through the head side of the engine immediately after operation while it's nice and hot and the opening is a lot wider than the dipstick channel.
To test this theory, I took 3 bottles. Filled the first to 1/3 liter of 0w-20, marked it's level on a flat surface, then poured 1/3rd of that amount of 92 octane into the oil, mixed it up and took a measurement of the new higher oil level and set the clock at 1220 when i did so and let it sit with the cap off. For a control subject to test how well fuel evaporates at all on it's own, I took another bottle and filled with 1/3 liter of just 92 octane, marked, timed and let that sit with it's lid off in tandem to the diluted oil to monitor both rates of evaporation over an 8 hour period. The last bottle i filled with 1/3 liter of pure 0w-20 and did the same procedure just to be sure oil couldn't evaporate on it's own either. All bottles were tested indoors with plenty of ventilation between 72-76 degrees F. relative humidity 85%.
After the 8 hour period, I could clearly see the fuel bottle 3mm below it's original line. definitely evaporating at a decent rate. The diluted oil wasn't evaporating as quickly at nearly 2mm below the marked line, but nonetheless it was definitely decreasing as the fuel separated from the oil and vaporized out of the bottle. The pure oil bottle did not stray from it's mark at all just as suspected.
This in practice has a user error risk to it - forgetting to seal your dipstick and oil caps before setting off each morning, or critters getting inside if you live in a wildlife infested area. But for the competent individual who doesn't mind adding a (albeit unnecessary) ritual to their daily routine after going to and coming home from work and parking your car for long periods of time, this could be a viable way to combat the dilution problem until honda can find a more permanent fix.
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