Engine Oil....???

Which engine oil is best to use in my 1988 1.8 GTI DX engine please gang???

Thank you.


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10W40 semi-synthetic would be my vote. There's personal preference involved as well of course, but for Mk1's & 2's, it would seem 10W40 is seen as one of the standards these days. 

Alternatively you could consult the chart in the owners and/or service manual (I would post it but I am currently away from home) with grades of oil vs temperature and experiment to find which best suits your cars needs.

Thank you Fausto.

So fully synthetic isn't the way to go with the 1800 DX engine…
Anyone…??


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BirchyB0y said

Thank you Fausto.

So fully synthetic isn't the way to go with the 1800 DX engine…
Anyone…??


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Not on a engine that has been run on Dino oil, you can but expect oil leaks once the old oil is cleaned up a bit.
Usually after your 3 or 4th oil change running synth.

I have used 10w40 or 20w50 Castrol in all my 4 bangers since the 70's, the only exception was my Diesel Rabbit that I ran 10w30….

If it was a new or rebuilt engine will all new seals everywhere, then Synth would be ok,,,, but don't change mix in the middle of life….

Done. Thank you both.

10W40 it is.

Appreciated as always.


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Yeah I use triple qx semi 10w40 in my old motors. 

It's like 12 quid for 5 litres. 

This is often recommended, I have no complaints: AVS Car Parts