Originally Posted by gegundez
In traffic crawl, I can't tell any difference, so regular gas and synthetic oil every 15k miles will do fine for now. When I retire in 20 years, I look forward to living anywhere with hills that it isn't so congested!!
Why wait 20 yrs ? How bad would it be if your time expired while in crawl, never getting your chance for the hills ? Live well friend ! Now back to the subject at hand, I have an 06, V-6 and I run 87 all summer long, no problems, no knocking, but come winter , every third tank I run high test for the cleaning property's, and yes there is an improvement in performance and the engine runs much smoother. Oh yeah nice rig, Drive on.