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oil change

What amount of oil is required to refill after oil change. Including filter change on a super 90
When is best time to check oil, cold??
Castrol 20-50 ok??
Thank you

Old 10-10-2014, 05:47 AM
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20w50 is fine, but Castrol isn't on my list for any older Porsche. Engines with flat tappet cams require an oil with an appropriate amount of zinc, and Castrol isn't one of those. Brad Penn would be my first choice, but I believe there are others. A full on oil change, including cleaning the screen and removing all the oil from the filter housing, will require about 4 liters, or 4.5 quarts. I check the level at normal operating temperature after the engine has been turned off for at least a minute.

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Old 10-10-2014, 06:54 AM
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Make sure the new gasket that goes on the top of the oil canister is the right size. Depending on the vendor they do vary and it has to be perfect or you are in for a major leak.
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Old 10-12-2014, 06:58 AM
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Rotella T 15/40 is a good diesel oil with all the zinc for a flat tappet engine. Reasonable price too.
Old 10-12-2014, 08:21 AM
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This is good stuff with all the additives you need.
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Old 10-12-2014, 02:32 PM
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Quote:
Originally Posted by Les Paul View Post
Make sure the new gasket that goes on the top of the oil canister is the right size. Depending on the vendor they do vary and it has to be perfect or you are in for a major leak.
The Napa brand 1010 "Gold" filter comes with an appropriate sized gasket
Old 10-14-2014, 04:28 AM
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Not all gaskets are/were created equal just a tiny bit to big. I started making my own years ago.
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Old 10-14-2014, 08:01 AM
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4 qts of Brad Penn 20-50, crank the car, let it warm, re-check and add as required. I do it cold to "right under the full mark on the stick" knowing that it'll expand when warm/hot.
Old 10-16-2014, 01:01 PM
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Are the washers used on the 6mm nuts on the oil strainer cover reusable? Iím used to Beetle oil strainer where crush washers are replaced. Thanks.
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Old 05-19-2020, 06:05 PM
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Are the washers used on the 6mm nuts on the oil strainer cover reusable? Iím used to Beetle oil strainer where crush washers are replaced. Thanks.
yes
Old 05-19-2020, 07:30 PM
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leakage

I have noticed our 1964 SC has had some oil seepage when sitting (like over the winter). As a general rule I change the oil every spring to kick off a new season. Upon removal I noticed the aluminum filter screen was deformed around the through holes, like too much torque had been used in the past. I made a cursory inspection of the stamped steel cover plate with a straight edge along the length and sure enough the steel around the holes was deformed from prior excessive torque. A simple flat file corrected the deformed steel plate and a new aluminum filter screen is on the way from our host.

I cannot recall the torque for these sealing 6mm nuts, but cannot be much
Old 05-21-2020, 10:58 AM
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I used a 1/4” ratchet and held my hand close to the head of the ratchet Tightened where my wrist couldn’t turn it any more. I’ll have to collaborate that with a torque wrench down the line.
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Old 05-21-2020, 01:57 PM
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In the 7 ft/lb range for a 6mm bolt as far as I can tell. I am not sure how that equates to a 1/4" drive ratchet wrench, but I would say it's a good starting point.

Old 05-23-2020, 03:00 AM
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