Syn-agog
I've always agreed with your advice that, given the complexities of modern motors, the best things drivers can do for themselves is change the oil at 5,000 mile intervals and use high quality fuels. As far as I can make out, the recommended oil for my recently acquired 70,000 mile 2003, XJ V8 4.2 (alloy body) is 5W30 semi synthetic. Is there any advantage in using fully synthetic? (At least the sump capacity of this one is 6 litres and not the huge 8 litres of my former X300 in which I always used fully synthetic.)
Asked on 31 January 2009 by
Answered by
Honest John
5w30 is Ford's standard semi synthetic oil and it's very good stuff,
standardised across the Ford range and presumably PAG as well unless then engines really demand something extra special. If you swap to ‘fully synthetic’ in an old engine it can dislodge hydrocarbon deposits and this might have a detrimental effect.
standardised across the Ford range and presumably PAG as well unless then engines really demand something extra special. If you swap to ‘fully synthetic’ in an old engine it can dislodge hydrocarbon deposits and this might have a detrimental effect.
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