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Registered
Join Date: Dec 2001
Location: New Jersey
Posts: 43
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Oil Confusion
I was told that synthetic oil will not maintain viscosity at high temperatures.. Thus, oil pressure drops and engine blows. Can somebody give me the straight story here or provide a link to a site dealing with this specific issue?
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Registered
Join Date: Aug 2001
Location: Brighton UK since 11/2012
Posts: 3,170
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Synthetic is specifically designed for the tighter engine tolerances and higher temperatues now encountered in late-model vehicles. If there was a problem I don't think all major European manufacturers would exclusively use synthetic.
It dpends on what type of car you have and what your're using the car for; everyday and some track use then a good non-syn oil is fine. For later models, Porsche advises the use of synthetic, check your owner's manual. Personally, I believe Kendall GT1 20/50 is a good oil for all Porsches that don't require synthetic.
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From November 2012; Precision Porsche Specialist Sussex UK, +44 (0)1825-721-205 2001-2012 Gerber Motorsport Inc. 206-352-6911 07.15.06 1996 Ducati 900SP. Suprisingly enough, it's red 08.16.09 1999 Kawasaki ZRX1100. Green. |
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,050
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Quote:
Synthetic oil holds up better to heat than regular dino oil. It will maintain it's pressure better. I have personally had a car that I ran regular 20W50 in that at idle when fully warmed up would have 10 psi when idling. I then changed to Castrol Syntech 5w50 which when fully warm would run 15 psi. Mobil 1 should give similar results. I'm not saying to expect that exact difference, but one of the main selling points of Sythetic motor oil is that it will withstand heat better than Normal Dino oil.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa ![]() |
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Re: Oil Confusion
Quote:
Jerry M '78 SC |
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Registered
Join Date: Dec 2001
Location: New Jersey
Posts: 43
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The car that this tale originated with is a 1965 Aston-Martin Lagonda. There is so much crap that circulates around about synth. oil. But the mechanic that came up with this one is truly a gifted an VERY! accomplished craftsman (have seen him rebuild Ferari Tiga, Porsche 962 and Indy car along with many others). I tend to revere the guy.
I run Mobil 1 in everything but the 911. It is a 1967SWB but in 1987 had a 2.3 liter 1972 engine installed. I don't know if any of the gaskets and/or seals are silicone (probable leaking points with synth.) and run 10-40 or 20-50 Castrol. |
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mccan, I rebuilt a VW engine a few years ago and put some performance parts into it. After driving on the highway for a few hours, the engine would get kinda tight and sluggish. I'm assuming that this was from heat. I then switched from Castrol 20w-50 to Mobil 15w-50 and proceeded to drive it from Maryland to Florida. The car was gitty! The peppiest I've ever felt and it ran beautilfully. I was absolutely sold at that point on synthetic oil...espically Mobil 1. Nobody can tell me that it's not a superior oil.
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Matt '82 911SC Targa! |
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