Mark Adams Posted December 4, 2012 Share Posted December 4, 2012 I have just purchased 10 Ltrs of 15-40 Mineral oil for my 1996 300 TDI discovery. I had not relised that it was mineral oil until I got home, It says it is fine for diesels so will it be OK for the Disco? It has done about 180,000 miles so fairly high milage. Mark. Quote Link to comment Share on other sites More sharing options...
PaulN Posted December 4, 2012 Share Posted December 4, 2012 Probably be shot down by a tecnically orientated grown up but IMO it's Perfect! Especially the thicker oil too. The lower viscosity synthetics are excellent but too thin imo for our older and poss worn 'gines and mineral is cheaper too. Semi synths are a rip off... Mineral is what I use but I do always change at 5-6,000 intervals hth Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted December 4, 2012 Share Posted December 4, 2012 A decent 15w40 is perfect. The Tdi runs too dirty to make the cost of synthetics worth while. Also change the oil often. My engine is at 308 000 kms and I change the oil at 5 and the filter at 10. A representative of the filter makers here told me the filters work better when used, but don't leave them too long. (Oh, and I use 500 ppm diesel which is high-sulphur so it doesn't pay to leave the oil in the engine too long as it goes acidic). Quote Link to comment Share on other sites More sharing options...
Boydie Posted December 4, 2012 Share Posted December 4, 2012 My engine has done 309,054 kilometers and during its life to date has run on several types of oil, ranging from vegetable (Castrol "R") , mineral oils and various degrees of synthetic oil and to this day doesnt 'use' a single drop of oil between oil changes which are carried out every 6000 kilometers and with oil, fuel and air filters changed every 10,000 k's and I can honestly say the enviroment here in Oz is far more abrasive, dusty with greater temperatures variations than you will ever experience in the UK. A good quality 15w40 is perfect, old tractor engines such as ours just dont get to strain themselves hard enough to burn it and if they do then an engine overhaul is called for. The most important lubricated component on our engines is the turbo, at 18,000 rpm it need lots of CLEAN oil flowing through it to lube and coo, the shaft, shaft bearings and seals. Incidentally now with the compulsary inclusion of 10% ethanol in commercial diesel in NSW Australia I now drop 250ml of 2 stroke oil in my 135 litre tank at every second fill, ethonol is, or can be abrasive but it readily mixes with 2 stroke and the 2 stroke oil makes up for the drop in natural diesel lubrication, being 2 strike its designed to burn cleanly and doesnt leave any residue. You might want to think about doing the same if you use fuels with ethanol addatives. Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted December 5, 2012 Share Posted December 5, 2012 I also add 2-stroke to my diesel. The starting is now a 'flick of the key' just as it was back in 1996! Quote Link to comment Share on other sites More sharing options...
PaulN Posted December 5, 2012 Share Posted December 5, 2012 Ditto! Makes a diiference you can both hear and feel too! Quote Link to comment Share on other sites More sharing options...
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