Quote:
Originally Posted by tasdrouille
The oil change might have helped, but a >10% improvement in FE from switching oil is unheard of. Have you measured a difference in steady state driving under load?
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My wife has the scenic since my Xmas challenge (we swap cars regularly) so I didn't drove it on my daily commute since. During my challenge I have seen 2.6L/100 instead of 2.8 at 80km/h and 2.2L/100 instead of 2.3 at 70km/h, but as it wasn't my daily commute I can't say if it's the same phenomenon or because I was on a little downhill my brain couldn't detect.
What is sure is that before the maintenance my wife was at 6.0L/100 and her last 220 km are at 5.3L/100 with colder temperatures. She has short commutes of 32 km round trip and does several smaller trips. I asked her if she changed something in her driving and she replied no.
I have to do the maintenance of the other car (4 years older : 97). The manual doesn't talk about 5W oils, only 10W and 15W. I'm wondering if I can use the same 5W40 oil. I'll ask the mechanic Friday.
Denis.
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