Extended oil use and consequences.
#21
10-21-2011, 05:07 PM
Is the increased engine temperature reflected on the water temperature gauge?
I have read any number of posts by people running synthetic oil longer than the car manufacturer specifies (for dino oil, anyway) and have never read of increased temperature. I would be tempted to keep track of head temperature with an IR thermometer and if I was getting a considerable increase I'd do something different (change the oil more frequently or switch to some other oil). Extra heat can't be good.
I have heard reports of oil leaks being worse with synthetic.
For what its worth, the only data-based study of synthetic oil I have read was done many years ago by the Consumer's Reports people. Their methods seemed really solid to me. They ran a bunch of taxis 70k miles and measured engine wear before and after. They concluded synthetic oil was a waste of money. The suggested: use dino and change it when the car manufacturer suggests. That is what I have done for a really long time with many high-mileage cars and trucks.
I have read any number of posts by people running synthetic oil longer than the car manufacturer specifies (for dino oil, anyway) and have never read of increased temperature. I would be tempted to keep track of head temperature with an IR thermometer and if I was getting a considerable increase I'd do something different (change the oil more frequently or switch to some other oil). Extra heat can't be good.
I have heard reports of oil leaks being worse with synthetic.
For what its worth, the only data-based study of synthetic oil I have read was done many years ago by the Consumer's Reports people. Their methods seemed really solid to me. They ran a bunch of taxis 70k miles and measured engine wear before and after. They concluded synthetic oil was a waste of money. The suggested: use dino and change it when the car manufacturer suggests. That is what I have done for a really long time with many high-mileage cars and trucks.
#22
10-21-2011, 06:53 PM
So would you post up:
1) an image of the sample submission form, <what information you send in> and
2) an image of one actual analytical lab results form? <what information you got back>
Thanks.
#23
10-21-2011, 07:13 PM
Beats me. And again, I'm not saying change to what I do; these are strong motors they'll run whenever ... That said --->
My experience with aging of oil is only qualitative, the engine feels a little bit more sluggish. I drive a 5sp, but don't know if that's relevant or not.
After the change it feels better - can tell difference if change is at 4000 miles; can't tell if change at 2500. Nothing more than that.
So I add 1/2 qt at 2000 miles to replace loss, and change at 3000 - 3500. nothing fancy.
222,000 mile, 1993, 5sp., no engine work.
My experience with aging of oil is only qualitative, the engine feels a little bit more sluggish. I drive a 5sp, but don't know if that's relevant or not.
After the change it feels better - can tell difference if change is at 4000 miles; can't tell if change at 2500. Nothing more than that.
So I add 1/2 qt at 2000 miles to replace loss, and change at 3000 - 3500. nothing fancy.
222,000 mile, 1993, 5sp., no engine work.
Last edited by UhOh; 10-21-2011 at 07:15 PM.
#24
10-21-2011, 08:06 PM
I know that conventional oils become acidic with time, especially if not driven regularly. This is an issue in winter months for my friends in Mammoth Lakes (Eastern Sierra Nevada mountains)...They ski all winter and ride the bus to work.
#25
10-22-2011, 12:14 AM
You read my mind, been having problems reducing the file size to put on here. Problem with Reader, hope to fix or have an alternative soon. Please check back.
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