Advice on engine oil

Hi lads,just a quick one on what grade of engine oil would be the best best for my diesel,she has done 300km and run really well but throws out a little bit of smoke when you give her a boot full,I know this is to be expected with the high miles but was wondering if a slightly thicker oil would help,I put a STP oil treatment in and it stop the smoke but after about 3 weeks it finned out and she started smoking a bit again,as always your advice is most welcome

whatever yu can get in Portugal. change it regularly

mobile 1 10w60

I use Total 9000 synthetique changed every 6K miles. A bit of smoke is normal when you boot it especially if it is pre MAF.

Thanks a lot again lads for your help I shall go and see what I can find,to be honest there is a good selection of oils in portugal so shouldn't be to much bother,thanks again

Landy lance said:

Thanks a lot again lads for your help I shall go and see what I can find,to be honest there is a good selection of oils in portugal so shouldn't be to much bother,thanks again

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Lance living where you do and with an high miler. 10w 40 is too thin, i would go for 10w 50 minimum. Change filter and oil often, no need for fully synthetic oil unless you have money to burn, any good mineral oil or semi synthetic will do.

When you say smoke can't see that it would be oil unless it's blue and smelly ?? Black air filters over fuelling.

STP is crap - rather than spending on premium oil, I'd buy any half decent budget oil plus a bottle of Lucas oil stabiliser - it really does what it says on the tin (the only snake oil I've ever known to work) it cuts oil burning dramatically.

STP or Wynn's is excellent for use in engine assembly. Used it for a very long time and can't fault it.

Agreed - great assembly lube - but I've never seen any of them actually aid a sick engine - unlike Lucas, where I've seen oil guzzlers (on fresh oil) which have no hope of passing an MOT (HC emissions) being "cured" by Lucas oil stabiliser. My brothers old Daihatsu used to use more oil than petrol! A bottle of Lucas cured it - I would not believe it unless I'd seen it with my own eyes. I've used Wynns and STP (which appears to be similar stuff) many times in the past and I cannot say I've ever noticed a difference.

StuckAgainSteve said:

Agreed - great assembly lube - but I've never seen any of them actually aid a sick engine - unlike Lucas, where I've seen oil guzzlers (on fresh oil) which have no hope of passing an MOT (HC emissions) being "cured" by Lucas oil stabiliser. My brothers old Daihatsu used to use more oil than petrol! A bottle of Lucas cured it - I would not believe it unless I'd seen it with my own eyes. I've used Wynns and STP (which appears to be similar stuff) many times in the past and I cannot say I've ever noticed a difference.

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Miracle stuff then. I have never seen anything out of a bottle to be honest, that will replace white metal, tighten worn valve guides and build up worn out piston rings to be honest.

I'm not suggesting it replaces metal! But I have seen a car (Daihatsu) spectacularly fail its emissions test, visible smoke let alone high HCs, the next day we brought it back to the MOT station with the Lucas HDOS added to the engine oil and it passed - no visible smoke either. "What was wrong?" the tester quizzed (surprised because the previous day he said "the engine's f**ked") - "oh a blocked breather increasing crankcase pressure" I fibbed in response!

My own car used to burn about a litre of oil per 1,000 miles (which I thought was perfectly acceptable) a bottle of Lucas later and it burns oil no more - 5K+ miles without burning a drop since I added the Lucas. It's due another oil change - I shall hold off on a new bottle of Lucas at the change to prove the additive is doing its stuff.