The Subject Of Oil Again

[Jobow]

Hi all,

Just a quick question.

I see in the manual it recommends 5/30 oil, which is fine.

Is there anything wrong with using a fully synthetic 0/30 or 0/40 oil? (Mobil comes to mind) I would have thought it preferable to use these as they withstand freezing temperature, are quicker to get around the engine and provides better protection and efficiency.

Anyone use these grades of oil and if you did, would it do any damage?

I personally cant see how?

Many thanks

Joe

[The Transporter]

No problem going with synthetic if you like, but what do you hope to achieve by second guessing the oil viscosity stated by the manufacturer?

When I was a kid I had a Vauxhall Viva with worn big ends, so i decided to shut it up a bit by using some EP90 that I had been given free, well it quietened the big ends down and ran for many thousand miles before I pulled the engine and swapped it with another so I could conclude that using EP90 in the engine did no harm whatsoever... But I think that we all know that this issue is a little more complex then that.

[Jack300]

I used to put 'thin' oil in a car when I first bought it - to clean out those 'difficult to reach' internal parts - and then change it to a thicker oil (as specified) about 3k miles later. I can't say wether the thinner oil did what I expected of it but, I can say that the engine was noiser on the thinner oil.

...that's a piece of useless information for you.

Shell Helix Ultra (5W 40) - just done an oil change in my IS300. £5 per litre - eBay (plus del).

Good luck

jack