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The tricky business of octane, power, and MPG

Given tepid green-car sales numbers this year, consumers in the US aren't making the transition away from internal combustion engines too quickly. Regulations are still mandating cleaner emissions, though. In addition to downsizing and turbocharging, there's growing consideration about moving to higher-octane fuel to improve overall efficiency. In a new report, engineers at FCA, Ford and General Motors Powertrain are showing that it could work, too. The major advantage to higher-octane fuel is that it supports higher compression ratios. That in turn can lead to more power from burning the same amount of gas. "Higher ethanol content is one available option for increasing the octane ratings of gasoline and would provide additional engine efficiency benefits for part and full load operation," the researchers write in the study's abstract. The authors even think it could be possible to update some modern vehicles' engine calibration to be optimized for the better gas. While the benefits are there, we still have a long way to go before higher-octane fuel becomes a national standard. According to Green Car Congress, 87 percent of the gas sold in the US is regular grade 87-octane. Meanwhile, premium 91-93 octane makes up just 10 percent. The various grades of fuel illuminate even more annoyances with the current system. For example, Ford generally recommends 93-octane for EcoBoost engines, and the power outputs that the company publishes are based on using it. However according to Green Car Reports, such premium gas is very difficult to find in some regions of the US, especially along the West Coast. The powertrains still run on lesser grades but with lower power output. The researchers' discussion of possibly increasing ethanol in gas also comes during a heated debate on the substance. The current administration is pushing for less of the corn-based fuel in the coming years. Although, several presidential hopefuls might be favor of reversing that course.

GM already raising prices on 2014 Silverado and Sierra pickups

General Motors must be pretty pleased with sales of its two newest pickups, the GMC Sierra and Chevrolet Silverado, as it's announced price hikes for both models, as part of a planned price tweak.
Prices will be bumped by as much as $1,500, although weirdly, they'll be offset by as much as $1,500 in cash-back offers through the end of October. Fox Business reports that GM spokesman Jim Cain said of the price hike, "With the sell down of the '13 models nearly complete, this price adjustment was planned and is a normal part of business."
The move, as Fox is quick to point out, is an interesting one, as sales of the twin pickups struggled last month relative to the Ford F-Series, while both of GM's crosstown competitors have been aggressively undercutting Silverado and Sierra prices. The F-150 starts at $24,070 and the Ram 1500 comes in at $23,600, not counting any cash on the hood. A base Silverado, meanwhile, retails at $25,575.

2015 Ford F-150's aluminum body not expected to hurt resale value

A cloud of skepticism has hung over the 2015 Ford F-150 since even before it went on sale. The issue had nothing to do with the truck's capabilities but instead over reservations about the switch to aluminum body panels. The change helped shed about 700 pounds off the scales, but the lighter metal also came with the potential for higher repair costs. Edmunds even recently whacked its pickup with a hammer just to find out how much it would cost. However, this might not be a problem, because the latest calculations indicate resale value for the new F-150 is on the rise. The residual experts at ALG estimate that the 2015 F-150 is going to hold 58 percent of its value over the next three years, versus 52 percent for the 2014 model, according to Bloomberg. That figure also gives the Ford the highest forecasted resale value among American fullsize pickups. The 2015 Toyota Tundra leads the segment by holding 63 percent. Meanwhile, the 2015 Chevrolet Silverado and GMC Sierra both come in with 51 percent, and the Ram 1500 holds 46 percent. Finally, the 2015 Nissan Titan comes in at 42 percent. The researchers believe that the improvement in fuel economy for the 2015 F-150 at up to 26 miles per gallon highway offsets higher body repair costs. "We are giving credit for the aluminum construction in the fuel efficiency we're seeing," Eric Lyman, ALG vice president of industry insights, said to Bloomberg. "We are not putting in a negative adjustment for concerns around repair costs or durability associated with aluminum." Ford has long-been preparing for the switch to aluminum. The company purposefully designed the body sections to make repairs easier, and it also partially subsidized dealers' investments for new equipment to do the work. Related Video: