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Hi people am from the carribean and we have much discussion about what oils to use in our Vw so since Australia is even a more humid country than us in the carribean It will be very Informative to know what types of oils are used....and am looking for a guy with a knowledge about Audi, Bora/Jetta, golf, & passat to be a information guide in a European what's app car group as to the difficulties we face with these beautifull European cars any one interested I will hook u up in the group


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10W40 or 20W50 are good types of oils to run in the 1.8. How ever you may want to consider racing versions of each weight as the normal oils are deprived of the Zinc content that keeps the bearings protected. You can read about it by googleing. Which ever type you use be sure that you use a good filter ie: Mahl, Mann, Genuine VW, Purolator GOLD, NapaGold, WIX, Mobile1, these are know to work well and not give you flaky oil lights at idle.

Bosch, Generic Store Branded, as well as Fram have been known to cause intermittent low pressure lights at idle when warm.

If you do not get your car up to temp, as in short drives, stop for a few minutes and repeat, you may see Milky colored oil. This is due to condensation not being burned off by a well warmed car... If you drive for extended times, and notice the milky oil, then that is a possible blown head gasket.
 

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Depends on the year, and it's in the user manual, most common is their 502.00 spec oil.

None of these newer cars call for any 10W40 or 20W50, and there are none of
those weights that carry a 502.00 specification. A 5W40 oil with 502.00 spec
would be fine, you just would have to change it sooner than 10,000 miles in the
hotter climate. Humidity has nothing to do with that.

The fact is, oil is subjected to more misinformation, controversy, out-of-date
knowledge, and myth than just about any other aspect of car maintenance.
The weight you put in, is what the user manual says to use. When a car is sold
in your country, if there are any adjustments to the specifications, that is done
and put into the manual. So, you use what the manual says to use.

You really didn't say what year your target thoughts were on... If you're buying
anything from 2001 and up, you will not find any 10W or 20W oils with a VW
specification. Engines are built with closer tolerances, which is why thinner oils
are used. Those 20W50 oils may also contain more ZDDP, and that level of ZDDP
is too high for late model vehicles equipped with catalytic converters.

Thicker oil makes for hard cranking, and reduces MPGs. It also takes a tad longer
for the oil to circulate that first few seconds of idling. You can damage the motor
with a too thick of an oil. There is no way you use a 20W50 oil in a 5W30 application.
Most VWs now are 5W30, but a spec 0W40 is fine, or even 5W40.

Motors now days have reduced oil clearance between the rod and main bearings and that
has a number of advantages. A smaller gap spreads the load over a wider area of the bearing
surface and distributes pressure more uniformly across the bearing. Using a thicker oil than
recommended is NOT good for the bearing. These new lower viscosity oils flow better into
and through the bearing. This also reduces the amount of oil pressure the engine needs,
so some extra horsepower is gained by reducing the load on the oil pump. Therefore, street
engines benefit from tighter tolerances and thinner oils for everyday driving. On top of that,
the oil return valleys in the head (going back to the oil pan) are a lot smaller, and are designed
for the thinner weight oils. If you happen to get ONE day where the temps go down into the
40s, that 20W50 is going to pool up in the head.

When you buy the car, open the user manual, and use what it says, simple as that.
 
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