I have a 2006 5.4 F-150 with 211,000 miles. My truck was running so bad the check engine light came on and I had to replace two coils it did help but it still ran really bad. I use one bottle of Lucas injection cleaner and within a 1/4 tank I noticed a big improvement, after I went through full tank my truck ran great, so I filled up another tank full of gas and Lucas injection cleaner, Wow truck runs so smooth and no hesitation this has to be the best on the market and especially the price. Thank you Lucas oil you saved me loads of money!!!!!!!

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