can i run with part synthetic oil

[vwvanman0]

Having a bad day today,done an oil change as the level seems to have risen,guess petrol is getting in there somehow

drained the sump then realised the oil i have is castrol gtx 15/40 part synthetic.

will this be any good? or do i need mineral oil.

thanks,steve.

 

[67panel]

will be fine ,allways put 10/40 semi in mine .

 

[Marvel]

Synthetic oil is fine, let's move with the times people. Just make sure it's the right grade, most of the "normal" castrol et al doesn't perform too well at hot. I use the halfrauds classic oil.

 

[bus72]

my choice is quality 20/50, one that contains zddp...

 

[Trikky2]

Sniff the old oil - it should not smell of petrol.

If you have petrol getting in the oil then theres only 2 ways.

1. The carb is flooding and fuel is running down the inlet manifold, into the combustion chamber and making its way past the rings - solution check carb is not flooding.

2. The fuel pump diaphragm is leaking/porous and is allowing fuel past, which drops into the case - solution remove fuel pump and check.

 

[vwvanman0]

Thanks guys for putting my mind at ease,

re the fuel in the oil,I'm pretty sure the level has risen and it does whiff of oil.

I had a go with a emisions tester and the co2 was up at 7% so well rich,I've wound my mixture screws in a turn.

I'm looking to get it all set up on a rolling road I'm running a 1776 with 36 delortos.

Cheers,Steve.

 

[sidecargezzer]

I do not have loads of time with the vw's but doing some researce on Syn oils for other app's such as my vintage race bikes and water cooled cars I have settled on this oil http://www.royalpurple.com/" onclick="window.open(this.href);return false; they carry 30,40,50 wt oil as well as multi grades ( 30-50) and have a high zddp level. This is my choice for all my cars and race bikes, will soon be changing the VW over to it once the motor is broke in.