Originally Posted by
foama
Answer:
1) This car has no EGR.
2) Old Mechanic's assumption the fuel being no good sounds logical and makes sense, but:
a):I filled up last at a well-known Shell brand station in Luxemburg a few hundred km away.
b) The local company using a half a dozen similar 3A90 Space Star/Mirages has suffered the same problem with each vehicle at least once, and they had much less milage at each occurence than my long-distance driven car, and I don't buy from "their" same gas station. After filling up last time, I immediately drove a few hundred km, so nobody could have done anything to the tank.
3) I don't really believe it is a software problem either, but I have to give them a chance to fix it. Then if they claim to have fixed it, I would have to wait to see how long their fix lasts...
Thanks for the reply.
There is a common problem in the US where the dealers regularly put 4-5 quarts of oil into the engines, when it requires much less. This could be causing excess aeration / foaming which could be either going through the now over-saturated PCV valve, or through some kind of a seal leak due to the oil overfill (or just bad seals from the start) or even both. That excess oil could easily causes carbon build-up problems.
This could have been the cause for that fleet, maybe you as well, but I'm not sure if you changed your own oil.
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View my fuel log 2015 Mirage ES 1.2 automatic: 51.7 mpg (US) ... 22.0 km/L ... 4.6 L/100 km ... 62.0 mpg (Imp)