BIG MPG Drop

AL13

New Member
Mar 28, 2018
6
0
1
67
I just had the valve cover gaskets and spark plugs replaced on my 2007 Limited. My MPG dropped from 14.5 to 11.1 ! Any suggestions on what the problem may be? Thanks
 

AL13

New Member
Mar 28, 2018
6
0
1
67
My shop couldn't find anything that might cause mpg drop. Had a power steering line leak but got that fixed. Re-checked all vacuum hoses. Look ok. I have noticed if I don't use premium gas I get a lot of valve clatter. Oddly enough mpg is hovering around 12.6 now. Would love better mpg but enjoy driving my Sequoia regardless.