Sorry I did not get back to you. I only seem to get some emails with people responding. I was actually planning to get one of those today as I'm doing a coolant flush within the next week. Thank you for the advice.form the km comment are you from Canada? is it a 4x4? X-Cab? or CrewCab? are you using a digital gauge for temperature readout? i'd suggest checking antifreeze ratio, you may have too much water. with the engine cold, remove the radiator cap and siphon a sample from there. the prestone gauge is pretty accurate.
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Wow. Never would of thought those parts would of made that much of an improvement. How many miles can you get on a tank? I fill up at about an 1/8 of a tank. I'm lucky to get 350 km.I had what I considered poor mileage. I also performed the usual in-depth tuneup(including cats and o2 sensors) as you did and the mileage increase was not what I expected, but after doing tie rod ends and upper ball joints and then a front end alignment, that was when fuel mileage nearly doubled.