Porsche 968 - Engine Oil Information and Types; Adding Engine Oil Steps; Engine Oil Performance Classification

Adding Engine Oil
1. Remove oil filler cap and pull out dipstick .
2.
Add engine oil of the grade already in the
engine. See also "Engine Oils ."
3. Check oil level on dipstick - level must not
be above upper mark.
4. Replace cap and tighten.
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Engine Oils
Use only engine oils which have been tested and
approved by Porsche . Your Official Porsche
Centre will be glad to advise you on the correct
type of oil for your engine . These oils can be
intermixed. Since, however, each brand of oil
has a special composition, you should, if
possible, use the same oil if it becomes necess-
ary to top up between oil changes.
If your vehicle is used frequently in stop-and-go
traffic in winter, the engine will not always be
properly warmed up . Condensates from pro-
ducts of combustion may accumulate in the oil.
In this case, it is advisable to change the oil in
spring so that your engine once again has a
100% efficient engine oil.
Engine Oil Perfonnance Class
Engine oil is not only a lubricant, but also serves
to keep the engine clean, to neutralize the dirt
which penetrates into the engine through com-
bustion and to protect the engine against corro-
sion. To perform these functions, the oil is pro-
vided with additives which have been specially
developed for the purpose.
Of - 20 0 20 40 60 80 100
Temperature
Single-grade
oils
Examples of Approved Viscosity Classes
So-called mineral oils are produced directly from
crude oil. The oils can be further refined (hydro-
crack oils) or totally converted through a num-
ber of chemical processes (synthetic oils).
These oils are structurally more efficient and ·re-
quire fewer additives for refinement than simple
mineral oils.
Use only hydrocrack oils of quality grade API SG
(US specifications) or CCMC G4 or G5 (Euro-
pean specifications).