There are numerous no- or low-cost steps you can take to combat rising gas prices. Most cars can run on regular unleaded 87 octane. High performance vehicles will usually require 91 octane or higher. Check your owner's manual to determine the right octane level for your car. It's also usually written inside your gas lid, door panel, and sometimes right on your dashboard under the fuel gauge. It will say something like 'Premium Unleaded Only' which means 91 oc...
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