If you all remember, late last year I had posted about a vibration at idle on my X. Not major, but bad enough to be felt thru the steering wheel and the seat od my pants. I had thot it might disappear after all the engine maintenance I had done. Well, it didn't. Never really got worse, just continually drove me nuts. I ran a bottle oe seafoam thru a tank of gas, thot that mite do it, but nothing. Yesterday i bought some Lucas upper cylinder lube and injector cleaner for gas or diesel. I instantly noticed a difference at idle, varies from little to no vibration.Time will tell if this took care of it. Does anybody regularly run fuel additives?

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Current-

--2003 X5 4.6
Estoril Blue
Black Nappa leather
rear air bags
OEM nav
OEM hitch
OEM cargo liner
Black housing SPYDER headlights - Evo-XR projectors

2017 GMC Sierra, 7K miles...
2017 GMC Sierra, 60K miles...
2015 GMC Sierra 280K miles...
2011 GMC Sierra, 500K miles...

Previous wheels:

--First love~
1969 Chevy C10, 396BB bored, 3 on the tree, Black ~SOLD~

--2011 Chevy Silverado LT 2500HD CCSB, Black, 250K miles ~SOLD~