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best spark plugs for a '91 F/I Festiva 5-speed?
I'd guess I'm getting close to the 10-15,000 mile range on the most recent set of spark plugs on my '91 fuel-injected Festiva L 5-speed;(170,000 total miles; all with MOBIL ONE, or now NAPA's synthetic which is cheaper) and have been thinking of pulling the plugs to clean and gap them since the mileage seems to be falling off a little in the 200 mile round trips from here to Seattle I'm making two or three times a month.(the cap and wires were changed with this set of plugs)
Now hovering around the 37 mpg area or a slight bit more, which considering there are only a couple of long not too high grades, other wise all flat interstate freeway much of which has a 60 mph speed limit; I'd of expected to maybe get 5 mpg better mileage driving.*
What I was thinking of was how in any car I've had, that a preference seemed to exist amongst people and mechanics in particular; for a certain brand and model of spark plug for each different make and model car.
I'm wondering if anyone would like to give their dissertations so to speak; on which plugs have proven best in Festivas, and particularly fuel-injected models like my '91 L 5-speed?
The ones I have now were the brand recommended at the KRAGENS auto parts store; which were the least expensive of the various "name" brands they'd sold which would fit my car.(NGKs I'm nearly certain)
Though if anyone felt I'd get better service out of a more expensive type I'd certainly experiment. One thing I do notice is over time the gap spreads and needs to be readjusted.
The plugs on the '66 VW "square-back" sedan I had a dozen years seemed to never go bad if I'd keep cleaning them and gapping them;(the electrodes never changed shape or deteriorated) which I'd only replaced because this wasn't very expensive and I'd worried they could not last indefinitely even if seeming to?(always getting the standard BOSCH plugs)
*Or maybe even more, since 45 mpg+ has been known in quite similar conditions during an "ideal" drive; with 155 R-13 tires multiplying x 1.03 to get what I feel is an accurate figure out of the odometer.(my notion of what is accurate since others even with GPS make conflicting claims to each other; let alone my own, I figure simply from highway & road map mileage figures, odometer checks of the five mile variety, drive through digital speed checks, etc.)
Now hovering around the 37 mpg area or a slight bit more, which considering there are only a couple of long not too high grades, other wise all flat interstate freeway much of which has a 60 mph speed limit; I'd of expected to maybe get 5 mpg better mileage driving.*
What I was thinking of was how in any car I've had, that a preference seemed to exist amongst people and mechanics in particular; for a certain brand and model of spark plug for each different make and model car.
I'm wondering if anyone would like to give their dissertations so to speak; on which plugs have proven best in Festivas, and particularly fuel-injected models like my '91 L 5-speed?
The ones I have now were the brand recommended at the KRAGENS auto parts store; which were the least expensive of the various "name" brands they'd sold which would fit my car.(NGKs I'm nearly certain)
Though if anyone felt I'd get better service out of a more expensive type I'd certainly experiment. One thing I do notice is over time the gap spreads and needs to be readjusted.
The plugs on the '66 VW "square-back" sedan I had a dozen years seemed to never go bad if I'd keep cleaning them and gapping them;(the electrodes never changed shape or deteriorated) which I'd only replaced because this wasn't very expensive and I'd worried they could not last indefinitely even if seeming to?(always getting the standard BOSCH plugs)
*Or maybe even more, since 45 mpg+ has been known in quite similar conditions during an "ideal" drive; with 155 R-13 tires multiplying x 1.03 to get what I feel is an accurate figure out of the odometer.(my notion of what is accurate since others even with GPS make conflicting claims to each other; let alone my own, I figure simply from highway & road map mileage figures, odometer checks of the five mile variety, drive through digital speed checks, etc.)
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