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Old 11-09-2011, 04:11 PM   #15
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Thanks all. I think I have the info I need.

I did look at the engine from the doghouse and the access to spark plugs is very awkward. I assume the plugs are replaced from the top??? Doesn't look easy.
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Old 11-09-2011, 04:17 PM   #16
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Quote:
Originally Posted by Midniteoyl View Post
Chevron Techron

x2
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Old 11-10-2011, 12:02 PM   #17
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Thanks all. I think I have the info I need.

I did look at the engine from the doghouse and the access to spark plugs is very awkward. I assume the plugs are replaced from the top??? Doesn't look easy.
Plugs most likely will be replaced from the wheel well, shouldn't be too bad if the wheels are off. (there may be some shield there too that needs to be removed)

But just out of curiosity, what kind of mileage are you getting vs. the kind of driving you are doing? Hills, speed, wind, towing, etc...

Have you compared your mileage from trip to trip and are you actually noticing a decrease or just hate feeling you pocket getting lighter at the pump? I know I am victim to the latter......
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Old 11-10-2011, 05:38 PM   #18
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Plugs most likely will be replaced from the wheel well, shouldn't be too bad if the wheels are off. (there may be some shield there too that needs to be removed)

But just out of curiosity, what kind of mileage are you getting vs. the kind of driving you are doing? Hills, speed, wind, towing, etc...

Have you compared your mileage from trip to trip and are you actually noticing a decrease or just hate feeling you pocket getting lighter at the pump? I know I am victim to the latter......
Thanks. I am not doing much driving right now but here near Houston TX, there are some hills on our trips north of us but overall it's really flat. I was getting about 7.5mpg or so but last check it was lower below 7 under same conditions.

I am just trying to improve efficiency and a little power if I can get it without a lot of cost. Injector cleaner and new plugs seemed like a cheap start. By the way, this is a '98 National Dolphin that I bought in March with 26000 miles. It now has about another 1000. It is older but in great condition and runs great. It was hard to start sometimes after it was warmed up which sounded like a possible injector issue. Today I added 1 bottle of Techron to the gas and drove around the parking area a few times. I plan to add up to 4 to this tank of gas (probably 60 gal.) They recommend you add a bottle when tank is low and then fill up. I never let it get low and it won't have a chance to get too low until next Spring. So I'm adding 4 to 60 gal. and see what happens. BTW, I bought a pack of 6 at Costco recently for around $20 so have used 1 in each of the two cars with 4 left over... So there you are.
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Old 11-10-2011, 06:03 PM   #19
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keep in mind the stock exhaust manifolds are restrictive on those 7.4. ALso the intake is less than efficient.
Having driven them with and w/o headers & cold air... the power difference was significant.
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Old 11-11-2011, 12:45 PM   #20
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Techron is very good. You could also have your system cleaned by a B & G dealer, it is also very good.
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Old 11-11-2011, 03:34 PM   #21
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Techron is very good. You could also have your system cleaned by a B & G dealer, it is also very good.
You got me there. A B & G dealer is....?
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Old 11-11-2011, 04:25 PM   #22
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