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'08 V8 vs '09 V8 for mpg

2.1K views 0 replies 1 participant last post by  tomdietrying  
#1 ·
I understand the '09 has a different programing for better fuel mpg. I think it is supposed to give you 5% more mpg. I believe that's about 1 mpg per tankful. My question is can you buy something to reprogram the '08 engine? Has anyone done this? Is it cost effective?
Thanks.
Tom