11-11-13, 10:47 PM
Not as good but a lot better. In that article they are talking about synthetic oils meeting SE spec. Oils are now up to SG even for mineral based oils. It used to be common to strip an engine every 10,000 miles to clean the carbon deposits off the valves and top of the pistons. Now it isn't uncommon for engines to go for 100,000 or considerably more without being touched. I've got two V8 Range Rovers, one with 186,000 miles on it and the other with 267,000 on it. That's all down to modern fuels and oils as the design of the engines date back to the 1960's.