924Board.org

[924turborox]

I've heard about the hype synthetic engine oils are getting.
Any truth about them?
Also, what about Royal Purple?
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1980 porsche 924 turbo 5speed getrag gearbox

[joecitizennn]

if you have not heard anything about the deletion of ZDDP from standard engine oil in the last several years then you have some reading to do. Synthetic oil is a must for older cars unless you are running a diesel or race oil with adequate quantities of ZDDP.
_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold

[924turborox]

I had read and heard about the reduction/deletion (I'm not exactly sure which) of ZDDP which is why I was a bit worried about it.
Any particular synthetic that you'd recommend? as opposed to the Valvoline VR1 20w50 I'm using at the moment anyway.
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1980 porsche 924 turbo 5speed getrag gearbox

[CorsePerVita]

I prefer to stick with brad penn.

but oil is going to vary a lot with opinions.
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- 1977 Porsche 924 2.0 N/A (Trackday Project)
- 1979 Porsche 924 2.0 N/A (The other daily)
- 1980 Porsche 931 (Daily)
- 1987 Lamborghini Jalpa
- 1999 Ducati 900SS

[Rattlinbone]

I had the same question a while back. After a little time at the library reading consumer reports, scouring message boards and gathering opinions, the answer I came up with is that Valvoline VR-1 20w-50 or Kendall GT-1 20w-50 is the way to go. But apparently it's a matter of opinion.
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Fred- 1979 924

[joecitizennn]

Valvoline vr1 is fine, but not a good oil to keep in your engine for a long period of time. Synthetic is a better daily driving oil. The argument over what kind could go on for 1000 pages. I say you can't go wrong with Mobil 1.
_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold

[Julian]

I switch everything I own to synthetic after break-in. Lawn mover, to work truck. My work truck has 180,000 miles on it. Last year I replaced the tranny so while I was that close I replaced the oil pump and rear seal.
The number 5 main bearings show no signs of wear still grey as they were when new. The truck still has the oil pressure that it did when new also.
Cost a little more, but I still change the oil between 2,500 and 3,000 miles.
When knurling guides the resizer at times will stop in the valve guide. When that happens I use synthetic oil to get the resizer to clear the valve guide. That's how slick that stuff is.
Draw back. If you have a gasket that might leak with regular oil, it will for sure with synthetic. It smells worse also, when it burns on an exhaust system.

[Cedric]

Hype? you write about synthetic oil like it was something new and unknown. Its been standard in the industri for years. Why not take advantage of 100 years of development I wont put anyhing other than a resonable specd synthetic in my cars, race car or daily driver dont matter (just different viscosity grades)..
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1980 924 Turbo
www.instagram.com/garagecedric/

[emoore924]

brad penn

It is not just synth/non-synth, it has to do with the flat-tappet overhead cam motors and zddp-deficient oils causing premature wear to followers and cams.....

but you pick what works for you

[924turborox]

Thanks 924ers
I meant hype as in the kind I've been getting from people trying to sell me stuff.
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1980 porsche 924 turbo 5speed getrag gearbox