So how bad did I screw up my oil change?
02-29-2008, 04:52 PM
#46
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03-01-2008, 12:27 AM
#47
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Define "real hot".
I experimented with some lighter weight oil last summer, just putting around town my car was not happy (low to no oil pressure at idle, clacking lifters etc...). I'm in NE Wisconsin, most of the country is warmer than it is here.
I experimented with some lighter weight oil last summer, just putting around town my car was not happy (low to no oil pressure at idle, clacking lifters etc...). I'm in NE Wisconsin, most of the country is warmer than it is here.
'No' oil pressure at idle? You probably need a new oil pump. Remember, at idle you don't 'need' a whole lot of oil pressure. And what your pressure gauge is measuring is resistance to the oil going through your engine. So low pressure is alright for lower rpm's. Hold on.......I saw this somewhere......I think in the 993 forum linked by someone above.......
Try this set of pages regarding oil and pressures, quite interesting:
http://63.240.161.99/motoroil/index.html
Took me a while to read through it, but it all became rather clear. Next oil change I'm going with the 5W 40 synthetic stuff. If my engine blows up, I'll let everyone know.
Last edited by Nightfly; 03-01-2008 at 12:29 AM. Reason: fix link
03-01-2008, 12:47 AM
#48
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Don,
Do a search under my user ID and oil pump.......it's not the oil pump. Find me a thread (other than mine) where a 928 oil pump failed.
My post above is what happened after I installed a new pump.
I wasn't worried about the gauge either. When I started to hear my lifters ticking, I took notice. I put the 20w-50 back in, it's been fine ever since.
I'm not the only 928 owner who's had this experience with lighter weight oil. Yes others have run their cars just fine on thin oil. Good for them. My car must be picky.
I agree you do not need much oil pressure at idle. I want enough to feed my lifters.
Do a search under my user ID and oil pump.......it's not the oil pump. Find me a thread (other than mine) where a 928 oil pump failed.
My post above is what happened after I installed a new pump.
I wasn't worried about the gauge either. When I started to hear my lifters ticking, I took notice. I put the 20w-50 back in, it's been fine ever since.
I'm not the only 928 owner who's had this experience with lighter weight oil. Yes others have run their cars just fine on thin oil. Good for them. My car must be picky.
I agree you do not need much oil pressure at idle. I want enough to feed my lifters.
03-01-2008, 11:34 PM
#49
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03-02-2008, 02:40 AM
#50
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03-02-2008, 06:28 PM
#51
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And remember that you need to use 75% synthetic oil flush and 24% conventional, as we discussed Saturday.
Or review the oil viscosity recommendations in your woners manual and find that you can safely run that stuff up to 80 ambient. Again, the telltale is going to be low hot idle oil pressure.
For those reading along at home, know that the car somehow made it over the Grapevine twice, survived the 80+mph (on private roads, no bears were harmed during the execution of this test...) blast across Orange County on Saturday morning, yet still seems to be running OK. At the time we left the subject, he had yet to pour in the gallon of engine flush for the ride home. Drive it for a week or two to get the old oil thinned out enough for a complete drain, then change to the correct grade of Pennzoil.
Does the engine flush clean out the filter enough to use it again?
Or review the oil viscosity recommendations in your woners manual and find that you can safely run that stuff up to 80 ambient. Again, the telltale is going to be low hot idle oil pressure.
For those reading along at home, know that the car somehow made it over the Grapevine twice, survived the 80+mph (on private roads, no bears were harmed during the execution of this test...) blast across Orange County on Saturday morning, yet still seems to be running OK. At the time we left the subject, he had yet to pour in the gallon of engine flush for the ride home. Drive it for a week or two to get the old oil thinned out enough for a complete drain, then change to the correct grade of Pennzoil.
Does the engine flush clean out the filter enough to use it again?
