Oil temperature, what's yours cruising in 6th gear on the highway.
03-22-2007, 06:18 AM
#1
AudiWorld Super User
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Oil temperature, what's yours cruising in 6th gear on the highway.
I'm doing another one of my surveys.
I'd appreciated it if some of the forum would take a look at their oil temperature gauge when cruising at a constant speed on the highway in 6th gear, when the temperature has stabilized.
I'd appreciated it if some of the forum would take a look at their oil temperature gauge when cruising at a constant speed on the highway in 6th gear, when the temperature has stabilized.
03-22-2007, 09:12 AM
#5
AudiWorld Super User
Thread Starter
Good question. I expect that it goes up the longer the oil is in the engine due to dilution
I'm currently trying a "different" oil that theory says will help combat dilution and think I'm seeing much lower temperatures, often 5 to 10 degrees lower. Since I never spend much time in 6th gear I don't have a good mental baseline on the temperature. I'm used to seeing anywhere from 217 to 230 while running in 4th.
Imagine my surprise to see 199 to 202 F while cruising down the highway.
Imagine my surprise to see 199 to 202 F while cruising down the highway.
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03-22-2007, 05:41 PM
#8
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Oil Temp Reading 3/22...
208 to 214 - after warm up, on a 20 highway miles. Commute - AM - 4:30, no one on the road, Outside Temp. 46 degrees, Oil Temp - at 80 to 100 mph, around 208. Commute - PM - 5:30, many on the road, Outside Temp 60 degrees, Oil Temp -at 45 - 80mph, around 214. I'm at 1460 miles, changed the oil at 600 miles, and haven't noticed any change in the dipstick reading since. Starting to get comfortable above 7K...
03-22-2007, 07:17 PM
#9
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Me, 198 - 205F @ 80 mph in 6th gear
I used to see about the same temperatures numbers as everyone else, until I started using the oil I am now. The difference is noticeable, since I've never seen cruising oil temperature drop down to 199F and below previously. This engine has a water/oil heat exchanger designed to bring the oil up to operating temperature quickly, so any change in the lower oil operating temperature is significant.
I can't tell you the oil I'm using yet. (Many would be shocked to know what it is.) But it was chosen specifically by Terry Dyson to combat fuel dilution. My working theory right now is that this oil is fighting dilution, and by so doing, is allowing the oil to absorb more heat, and thereby provide more cooling. The operating assumption is that as more fuel is added to the oil, the higher the average oil temperature rises. If the oil can fight dilution at the piston/ring seal, then we will see lower temps.
I can't tell you the oil I'm using yet. (Many would be shocked to know what it is.) But it was chosen specifically by Terry Dyson to combat fuel dilution. My working theory right now is that this oil is fighting dilution, and by so doing, is allowing the oil to absorb more heat, and thereby provide more cooling. The operating assumption is that as more fuel is added to the oil, the higher the average oil temperature rises. If the oil can fight dilution at the piston/ring seal, then we will see lower temps.
