Whats better? 5.4L with 115 000 Mi on it or 4.6 with 95 000Mi on it?

 

Run a compression test on it and hook up an oil guage. Those two test will tell you more about the condition of an engine than anything else. Easy tests, anyone can do it with about a $30 investment and it takes 5 minutes. :-)

 

5 minutes to either do a compression test or hook up an oil pressure gauge in a newer F150? This I want to see

 

ME TOO

 

If you were experienced at it, and you didn't do all the cylinders, you could do it. but for the average person, No way. Not even just doing a couple of cylinders. It would probably take most people loner than 10 minutes just to locate the oil tap, and install the gauge.

 

The silverado is a car, not a truck.

 

That question is quite vague? What is better? What are you looking for?

Both engines are very good engine. The 5.4 is somewhat more old fashioned and there is no replacement for displacement, as we know.

However, the 4.6l is a more modern enigne with overhead cams and can make a great work horse, especially in a truck that doesn't see a trailer behind it most the time.

I would rather have the low mileage engine for longlivety reasons. Wife's truck has the 4.6l with 155k miles and it runs great!

I also wanted to add that compression tests on the 4.6l are practiaclly impossible unless you get the truck for a whole day. Changing spark plugs took me 1.5 hours *with* the correct tools borrowed from a mechanic friend.

Cheers, George