hi again spook,
i changed out the original hubs at about 215k they were not grinding, and i installed the cheap chinese hubs that did start to grind in less than 3k miles.
chinese hubs are rubbish.
then i installed FAG, german hubs and saw the mileage improve drastically.
i coulnd't find FAG hubs for the 940, but got SKF and think they are oe hubs.
the new locking gas cap is due here friday.
perhaps the gas mileage will go up after i install that ? ;-)
do i need to worry about any o-ring or seal at the filler cap?
cheers, bill
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