My Escort GTi has now done over 100,000 (closer to 120!), and i've seen some people advising going from 5w30 oil up to 10w40 as its a bit thicker.

The cars a 1.8 Zetec.

Anyone else advise me on this please as im still a little unsure on the subject?

Thanks in advance

James

 

Castrol thinks so also

 

I wouldn't bother. A friend's dad runs an old mondeo with over 400,000 miles, runs perfect on 5w30!

 

My Mondeo got the 1.8 Zetec with 182k miles on it, I still run it on 5w/30 with no problems, has started leaking oil though (camshaft seal) and does burn a little on start up.

I considered a change of oil, but I'm now considering a change of engine, just don't know what engine I'm gonna go for though.

 

Does seem to be very mixed view's on this. Pretty much a 50/50 split from other things i've read on forums.

 

If it is burning oil due to wear, using a thicker oil will cause it to burn less, I used 5w50 in my brand new rebuilt zetec after I had rebuilt it without any problems at all.
The thinner 5W30 oil was used as a economy thing, ie less drag better effeciency.
tabetha