I just purchased a 2008 Mega Cab with 234000 miles on it, yes a lot of miles but it was really cheap and wanted a 4x4 for winter. The guy made statement that the plugs have never been changed, Im going to go this this weekend, I just have a hard time believing they have never been changed and it runs just fine! It doesnt smoke, spit, sputter, nothing! Has anyone else ever heard of plugs going that long? Any recommendations on getting them out if they have been in that long? Ive got a good idea of what to do just curious if anyone has any hints. Thanks in advance!

 

They're only 200,000 miles late. NGK 5306s. Don't let someone tell you it needs Iridium/Byzantium/Unobtainium/Expensivium.

 

What did you have to pay for the '08 with 234 miles?

 

4500.00.

 

If those are the original plugs, that engine must run like hell. The O2 sensors are LONG overdue to be changed.

 

But at the same time, why put in a plug designed for foreign vehicles in a domestic vehicle? If nothing else, put in what the manufacturer designed it for and came with it.

 

As you can read in original post, it doesn't run like hell, that is why I was questioning it. Yes, the o2 sensors need changed.

 

Whether or not a vehicle is foreign or domestic has nothing to do with the spark plug. I had a Ford Escort with the 1.9L engine that used stock Motorcraft copper plugs but ran great when I switched to Platinum spark plugs. Great, as in 400 miles per tank of gas even with the A/C running.


By "run like hell" I meant it's not going to be operating optimally if those are the original spark plugs. I recently serviced my truck and discovered whoever previously changed the plugs thought Lithium grease would work fine on the spark plug terminal. That, and I should have checked the air cleaner when I bought it as well.

Anyway, you may want to check the air cleaner and also pull the throttle body. Chances are that the backside is coated with carbon and oil. Even trucks that aren't neglected in the maintenance department experience that. There's a thread around here where we've discussed our findings. Note: Do not clean a throttle body with carburetor cleaner. Only use throttle body cleaner.

 

Oh now I feel bad

 

back and forth little by little with spray possibly