Spark plugs and efficiency

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Jan 5, 2024 | 06:47 PM

Garbageman 134

Thread Starter

More Turbo

Joined: Mar 2022

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Spark plugs and efficiency

Do spark plugs really affect mileage that much? It seems these days any name brand plug is going to work the same as another

Jan 5, 2024 | 07:28 PM

WXboy

Logistics Pro

Joined: Sep 2002

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From: Central KY

The only time I personally have seen plugs improve MPG and performance is when the existing plugs are worn out. I changed the plugs in a Ranger once at 100k and I got 2 MPG improvement immediately. I was surprised.

But if your plugs are still in great shape there really is no benefit in the various brands and styles out there.

Jan 6, 2024 | 07:16 AM

Split rims

Fleet Mechanic

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I know with the 6.2, not keeping up with plugs and coils can result in premature cat failure.

Jan 6, 2024 | 07:29 AM

DBGrif91

Cargo Master

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From: Des Moines

Quote:

Originally Posted by Garbageman 134

Do spark plugs really affect mileage that much? It seems these days any name brand plug is going to work the same as another

Only if they’re worn out or the wrong plug for the application.

Quote:

Originally Posted by Split rims

I know with the 6.2, not keeping up with plugs and coils can result in premature cat failure.

That’s true of any engine.

The primary problem I’ve seen with the 6.2’s is the coils collect moisture and the resistors/contacts corrode beyond the point of being able to clean and reuse.