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1988Hawk |
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#1
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Newbie ![]() Group: Members Posts: 41 Joined: 17-April 08 From: Chicago Member No.: 8,929 Region Association: None ![]() |
On a 88 degree day in Chicago I have tested two oil weights and have gotten the following results:
1. Brad Penn 10-30W, with peak running temp 205 degrees. 2. Brad Penn 20-50W, with peak running temp 225 degrees. Both exhibited acceptable pressure, so the question is which one would you select for summer driving??? |
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Jake Raby |
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#2
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Engine Surgeon ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States ![]() |
It all bolus down to the internal clearances of the particular engine. There is no general response for this question, as after so many years most every engine has been internally goofed with and clearances can be all over the place.
My engines use 15/50 oil best in hot climates, but thats because the internal clearances are set up to be optimized with this oil grade. Oil pump specifications and materials also play into this, and are often not considered when selecting an oil grade. |
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