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    Possible Misfire?? No check engine light

    Having a problem with my '99 4.6l Expy, no check engine light, but hesitation @ 45-50 mph(1500 rpms). Took it to autozone, no codes showed up on scanner. Plugs ,wires and fuel filter all new since fall '03. 90,000 miles, any ideas???? Thanks!
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    Oil used based on marketing, before BITOG

    How many members based their choice of oil on marketing before finding BITOG?? Examples---Arnie Palmer w/Pennz or one oil bottle looks "COOLER" than another.....
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    10w-30 in a 4.6l ford

    Would it be ok to use 10w-30 in a 4.6l ford modular or stick with 5w-30?? would the 10w-30 slow down the head gasket leak??? thanks, BL
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    Do all xw-30 dino oils shear to 20wt??

    Last two UOA's done on my wifes Maxima have sheared down to 20wt within 3k. Is this a given or are there xw-30's (OTC dino)out there that will stay in grade for 3k?? I've noticed the "High Mileage" oils start at a higher 30wt,is this the best option?? By the way, the oils mentioned above were...
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