If fuel dilution occurs - does the Oil temp increase ?
04-07-2007, 08:32 PM
#3
Dave be correct. Less thermal mass = higher temperature
You can actually watch over time as the oil temperature increases as it dilutes. Then listen to your engine thank you when you put new oil in and the temperature goes down.
04-08-2007, 01:20 PM
#7
< 200 F cruising = = very good
As long as it holds over the life of the oil. What often happens is oil being diluted at cold start and short driving cycles, and never having the chance to recover.
This winter we've seen a lot of high dilution and low flashpoint. It may be a consequence of winter driving. It also may be that these cars have a few more miles on them and are over the "magic" 5K limit.
One possibility I've hypothesized is that the "magic" 5k ECU remap increases the amount of dilution. So far, the record bears this out. Dilution is higher, and flashpoint is lower, for oil that was placed in service after 5000 miles. But this also corresponds to the winter months, so the increase might just be due to longer warmup cycles, too. In that case, I expect that fuel dilution would be lower in warm climates, and over the summer. Unfortunately, none of the southern contingent is rich enough to afford a $50 oil analysis. So we don't have data from the warmer winter climates. Our data comes from Washington, Michigan, Colorado and New England.
This winter we've seen a lot of high dilution and low flashpoint. It may be a consequence of winter driving. It also may be that these cars have a few more miles on them and are over the "magic" 5K limit.
One possibility I've hypothesized is that the "magic" 5k ECU remap increases the amount of dilution. So far, the record bears this out. Dilution is higher, and flashpoint is lower, for oil that was placed in service after 5000 miles. But this also corresponds to the winter months, so the increase might just be due to longer warmup cycles, too. In that case, I expect that fuel dilution would be lower in warm climates, and over the summer. Unfortunately, none of the southern contingent is rich enough to afford a $50 oil analysis. So we don't have data from the warmer winter climates. Our data comes from Washington, Michigan, Colorado and New England.
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Vijay
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04-08-2007 07:11 PM
