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OhioVic

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I ordered a 2021 XLT FX4 and picked it up about a week ago. I have been noticing a knock from the engine when it is cold, and sometimes on a warm restart. Does anyone know what is causing this and should I be concerned?
Other than that I love the truck. I got 27 mpg on the way home from the dealer. Averaging around 23 mpg mixed driving.
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allJUMPstyle

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Did you check your oil level?
 

Jack Miter

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If you haven't already try a tank of top tier premium 93 octane. Seem to recall reading somewhere the knock is from using 87 octane crap gas. Though I have a 3.5 EB, I have been running the 93 for two tanks now and the difference is night and day performance wise.
 

pkinneb

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If you haven't already try a tank of top tier premium 93 octane. Seem to recall reading somewhere the knock is from using 87 octane crap gas. Though I have a 3.5 EB, I have been running the 93 for two tanks now and the difference is night and day performance wise.
Unfortunately where I live 91 octane is about as high as you can get. RE "Top Tier" gas how does one determine that?
 

kb2755

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pkinneb

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kb2755

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I know this is probably a dumb question but if you purchase from one of the listed stations it should be top tier gas? My normal stations are all listed.
I use Costco in Canada and there are "Top Tier" stickers/info posted all over the pumps.
 

ZWARRIOR

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3300 miles in, I average 23.1 miles. But the little ticking noice? I do notice it sometimes, I assumed it was the little exhaust gate rattling a little
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