924Board.org

[kike924]

Shell is now promoting an oil for high mileage engines that has the 25W-60 rating (it´s mineral I guess)

What do you think of this oil for our 924 - Here in Buenos Aires the temperature in winter rarely goes under 5-7 C°
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Euro 924 1980 N/A
Daily driver + week end racer

[Khal]

Dunno how many miles mine has done since it was rebuilt (PO rebuilt it sometime in the distant past). But the *still working* odometer reads about 166,000km's (clocked once, as I understand it).

I use Mobil 1 10W-50 at the moment (it's fully synthetic, of course). Haven't had any problems with it. I imagine our minimum and maximum temperatures here are similar to yours there..?

Still, most new oils from suppliers like Shell and Mobil are probably so damn good I doubt you'll have any problems no matter what you use.

The only warning I can pass on is what I've read here, which is: Don't swap to a fully synthetic after using a mineral oil.

Even so, many here do not even necessarily agree with that...
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'80 924 Turbo

[CBass]

I think that might be a little heavy, unless you do endurance racing in the desert...

I run 20w50 during the summer, plain old Castrol GTX, and 10W40 in the winter time, temperature range is usually -5C to 15C for winter, 15C to 35C summer.

Synthetic is a good thing to have for a 924 Turbo for sure, given that the turbocharger is oil cooled, and synthetics stand up to that kind of abuse better than conventional oils.
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'81 931 in various states of assembly

[Mike924]

Definitely too heavy.

It will make your oil pressure look good, but that's because it will be slower moving through the smaller oilways - like up to the cam gear, for example.

20W50 should be the heaviest you'd need in any kind of moderate climate, even in a high-mileage engine.
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1985 Porsche 924 'Lux', Kalahari Beige (my ex)
1993 Porsche 968 Coupe, Midnight Blue, 6 spd

'There is no substitute for a little grease under your fingernails.' - Chrenan, 924board.org

[timstar92404]

I just use 20w50 Castrol gtx all year.
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78 924 sold.
85.5 944