Journal-News

Wheels: Gary writes by e-mail, "I generally have not been too receptive to these chip re-programmers and/or buying enhanced chips, which are supposed to give an engine better power and better MPG. However, I recently observed a Chevy truck with the 5.3-liter engine I have that was enhanced/re-programmed and it did, in fact, get better MPG. I am not convinced about the power output. I also saw where other items were reprogrammed, which I did not know could be done. Any insights?"

Halderman: Great question about chips. According to the engineers I talked to, they do work to some extent and they state that it "takes the engine out of compliance." This means that the exhaust emissions are higher but they would not be noticeable. What I have found that works is to install a "cat back" (all components behind the catalytic converter) low-restriction exhaust and a cold-air induction system. These will cost some money and the noise level will be higher but the fuel economy gains could be 2 or 3 miles per gallon from those who have tried them.

Wheels: Karl of Washington Twp. writes, "Despite the recent drastic reduction in crude oil and gasoline prices, why does motor oil remain at approximately $4 a quart?"

Halderman: Good question. Have you noticed that when crude oil prices increase, the price of gasoline increases immediately, but when the price decreases, it takes a longer time for gasoline prices to drop? Engine oil is a relatively small percentage of refined petroleum products. Also, engine oil has to be made to a variety of specifications and viscosities. Because of this, and the packaging and shipping, I do not think the price is unusually high. I was told by an engineer that the packaging costs more than the product inside, and then these quart containers must be shipped across the country and stocked.

Wheels: What do you recommend readers do as a result of high oil prices?

Halderman: Engine oil has been getting better and while the extra refining and additives do increase the cost, the oil can be used for longer in the engine than oils could just a few years ago. As the result of the improvements in engine oil and engines themselves, I now recommend that the oil be changed every six months or every 6,000 miles to 7,500 miles, whichever occurs first. Therefore, instead of thinking about the cost of a quart of oil, think about the cost of maintaining the engine on a yearly basis compared with a new vehicle.

If an oil change costs $50 and the oil is changed twice a year, this means that it costs about $100 per year to make sure the engine is properly maintained. Even if you use synthetic and the cost is double, I still think this is a reasonable cost compared with the price for a new engine or new vehicle.

James D. Halderman is an ASE-certified master technician and the author of 12 textbooks. E-mail him at jhalderman2@juno.com.