Quote:
Originally Posted by asperformance
not sure of your spec of car but 5w oil isn't for a classic IMO.......
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i'm almost standard running at about 300/310bhp. judging by my oil pressure gauge, 5w seems to be ok for me. if I get in and just drive 30mph from cold around town, oil pressure stays a little on the high side but the moment I get on to the A12 on my way to work (50mph) the oil pressure drops to normal on idle.
I thought 5w just meant the oil was thinner cold than 10w and therefore easier on the engine on cold start, especialy in winter