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<p class="p1">A clean engine is a more efficient engine (and also a more powerful one), so a fuel injector cleaning is an important part of maintaining your car. While you can always visit a mechanic to get this service done, this is actually one of a few maintenance items that are pretty idiot-proof when it comes to at-home DIY. How simple? You can do it at home without any tools or garage space. We previously went through <span class="s1">our list of favorites over on AutoGuidehttps://www.autoguide.com/top-15-best-fuel-injector-cleaners, and we recently discovered that four of our selects are currently on sale! Here's what you need to know:</span>

<p class="p1"><span class="s1" style="font-size: small;">Royal Purple Max-Clean Fuel System Cleaner and Stabilizer is 19% off</span>

<p class="p1"><span class="s1" style="font-size: small;">Lucas Oil 10512 Deep Clean Fuel System Cleaner is 32% off</span>

<p class="p1"><span class="s1" style="font-size: small;">Lubegard 77012 Fuel System Booster Cleaner is 11% off</span>

<p class="p1"><span class="s1" style="font-size: small;">Marvel Mystery Oil 50665 Ultimate Fuel and Motor Treatment is 14% off</span>

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which rated highest?

my test came up that i was running lean. the mechanic recommended trying injector cleaner for a while. It seemed to help for a little while, but the light comes back on after a couple days. I'm not sure if it matters, but it all started after i switch from the stock air filter to the K&N set up. I have switched it back to stock, but its still running lean.
 
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