water went down dipstick hole
02-01-2009, 03:33 PM
#23
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Under 'normal operating conditions' the oil should be at or slightly cooler than the coolant temp- if the coolant is doing it's job.
With my 78 VW Scirocco-1.5L (actually 1457 cc... and with factory oil temp gauge) the oil rarely exceeded 90-95C, unless I was hot on the throttle.
With my 78 VW Scirocco-1.5L (actually 1457 cc... and with factory oil temp gauge) the oil rarely exceeded 90-95C, unless I was hot on the throttle.
Last edited by abecedarian; 02-01-2009 at 03:37 PM.
02-01-2009, 03:38 PM
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Under 'normal operating conditions' the oil should be at or slightly cooler than the coolant temp- if the coolant is doing it's job.
With my 78 VW Scirocco-1.5L (actually 1457 cc... and with factory oil temp gauge) the oil rarely exceeded 90-95C, unless I was hot on the throttle.
With my 78 VW Scirocco-1.5L (actually 1457 cc... and with factory oil temp gauge) the oil rarely exceeded 90-95C, unless I was hot on the throttle.
02-01-2009, 04:23 PM
#25
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Our trucks are certainly not performance machines, but they would probably give the Prius a run for its money. I have driven a few and they are slow, slow, slow.
02-01-2009, 05:21 PM
#26
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Under 'normal operating conditions' the oil should be at or slightly cooler than the coolant temp- if the coolant is doing it's job.
With my 78 VW Scirocco-1.5L (actually 1457 cc... and with factory oil temp gauge) the oil rarely exceeded 90-95C, unless I was hot on the throttle.
With my 78 VW Scirocco-1.5L (actually 1457 cc... and with factory oil temp gauge) the oil rarely exceeded 90-95C, unless I was hot on the throttle.
02-01-2009, 06:25 PM
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1) if the coolant is warmer than the oil, the coolant accelerates warming the oil up to normal temp.
2) if the oil is warmer than the coolant, the coolant cools the oil.
...mostly the same reasons the ATF cooler runs through the radiator (at the bottom of the radiator, before the coolant goes to the engine)- the coolant will warm up faster than the ATF and warm the ATF, and will absorb heat from the ATF to mitigate temperature variations.
02-01-2009, 06:29 PM
#29
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two reasons:
1) if the coolant is warmer than the oil, the coolant accelerates warming the oil up to normal temp.
2) if the oil is warmer than the coolant, the coolant cools the oil.
...mostly the same reasons the ATF cooler runs through the radiator (at the bottom of the radiator, before the coolant goes to the engine)- the coolant will warm up faster than the ATF and warm the ATF, and will absorb heat from the ATF to mitigate temperature variations.
1) if the coolant is warmer than the oil, the coolant accelerates warming the oil up to normal temp.
2) if the oil is warmer than the coolant, the coolant cools the oil.
...mostly the same reasons the ATF cooler runs through the radiator (at the bottom of the radiator, before the coolant goes to the engine)- the coolant will warm up faster than the ATF and warm the ATF, and will absorb heat from the ATF to mitigate temperature variations.
02-01-2009, 06:36 PM
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I shouldn't be trying to argue much here I suppose, considering my reference is my 78 VW... (though my 81 was the same)... The oil temp on either of them rarely (as I mentioned) went higher than the water temp. If I drove them hard, the oil temp quickly rose higher than the water temps but even then didn't exceed around 240F- and that was without an oil cooler. Oil temps in both VW's on surface streets just cruising was about the same or just a bit cooler than the coolant temp. Maybe that's why I pulled almost 300k miles out of the 81 (using 20w50 oil) before I totalled it*?
*edit- when I tried to change the radio station and the Pontiac Bonneville station wagon stopped in front of me.
*edit- when I tried to change the radio station and the Pontiac Bonneville station wagon stopped in front of me.
Last edited by abecedarian; 02-01-2009 at 06:38 PM.
02-02-2009, 04:11 AM
#31
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Yeah my oil stays around 220-240* F (Mobil 1 5w30).
So to the OP, water boils at 212* F (@ sea level) so a little water in the oil will be boiled off when you get the oil up to temp.
So to the OP, water boils at 212* F (@ sea level) so a little water in the oil will be boiled off when you get the oil up to temp.
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