Premium Octane Explained in Plain Auto Advice
A reader asks why newer cars require higher octane and how important it is to follow the manufacturer. The column explains that higher octane delays detonation in high compression engines, preventing pinging and engine damage. Lower octane can harm the engine over time, while higher than recommended is wasteful.
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Tom and
Ray
Tom
Norma
GMC Yukon and Chevrolet Tahoe redefine mid-size SUV class
GMC and Chevrolet introduce the four door Yukon and Tahoe starting above $26,000, slotting between big Suburban and Jeep Grand Cherokee. They boast 9.8-foot wheelbases, 12 mpg city and 15 mpg highway, 7,000-pound towing, V-8 power, spacious cargo room, and a high ride with notable interior features.
MENTIONED IN THIS ARTICLE
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GMC Truck
Chevrolet
GMC
Jim Komas
Yukon
Wisconsin
Options Marketing Package For Vehicle Add-ons
The dealer lists an option package including aluminum wheels a six way power driver seat remote keyless entry and an upgraded AM FM stereo with cassette and CD player priced at 1952. Side running boards cost 195 two tone paint 180 heavy duty trailering equipment 164 and a special engine oil cooler 135.
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