norseman said:

NO, change the oil & (genuine) filter then use good a quality 20w/50 mineral oil with a high level of zddp content. These engines were designed back in the 'sixties & don't have especially efficient oil pumps & tolerances are not up to modern standards. The original 3.5 is the best version of the RV8, granted not the most powerful but certainly more bulletproof than the later 93mm bore units ie 3.9 & onwards. My last RR 3.5efi had done 160k miles when I sold it & still had factory spec. compressions. Regular oil changes are the key, don't go by LR's recommended 6k intervals, that's just a marketing ploy - halve that at least & also maintain the 50% anti-freeze level, changing the coolant at least every 2 years.

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discool said:

My old RR 3.5 had a service every six months by the main dealer and used 10w50 for the ten years of my ownership but it still had to have the cam replaced at 100k miles.
So as my my disco 3.9 is up to the more modern standards LR recommend oil based on ambient temperature, so any thing from 5w30, 5w40, 10w40 up to 10w60. The disco has always been run on 10w40 and with out and any issues in twenty years of ownership, of course being a bit more modern it also runs on OAT antifreeze with a five year replacement which is handy.

Power steering fluid is standard, it was Dexron llD but now that has been superseded by Dexron lll which is backward compatible so, there's no recommendation available.

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listerdiesel said:

We've used Chevron Supreme DIESEL oil in all of our V8's, the short engine I fitted in 2009 has nearly 100k miles on it and the camshaft was already used.

Got a 4.6 RR P38 as well now, and that is also on the same or similar oil, 10W-40 and rated for diesel engines.

Genuine filters used.

Peter

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