I have used on my car at 15k car has 48k on it now. That was before I had meth. And have did not do me any harm.
My personal opinion when it comes to these cleaners, is that if your proactive and do regularly before large deposits are formed. There no danger, but if your already sludged up. Then your to late to use this cleaning method. I plan on using on my moms ecoboost escape. Also I hear BG commercials daily for GTDI fuels system cleaning.
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