My replacement Yaris gets much worse MPG?

[CTScott]

I get 38-41 with my 08 AT 3dr LB and 34-37 with my supercharged 09 AT 5dr LB.

I would do all of the basics - clean the throttle body, check and potentially replace the plugs, clean the MAF, and check/replace the air filter.

[Shinare]

Originally Posted by CTScott

I get 38-41 with my 08 AT 3dr LB and 34-37 with my supercharged 09 AT 5dr LB.

I would do all of the basics - clean the throttle body, check and potentially replace the plugs, clean the MAF, and check/replace the air filter.

OK, will do all of these things. I found threads for cleaning throttle body and for MAF. These still good DIY's for the process?

Any particular plugs I should replace with? Can I get from AutoZone, Pepboys, or some pace or do I need to go to dealers?

Going to do the fan belt as well.