How often should you change spark plugs on a Acura MDX?

You'll need a spark plug for every cylinder your car has (4, 6, or 8) and they should be replaced about every 30,000 miles. The proper gap size for the plug can be found in your owner's manual. via

Does the MDX need premium gas?

Your Acura ILX, TLX, RLX, MDX, or RDX will run fine on regular gasoline, but using the recommended premium unleaded 91 octane fuel is sure to boost performance, increase longevity, and keep your Acura running as it should – providing you with the peace of mind you've been seeking. via

Can bad spark plugs cause transmission problems?

And since there's no cushion between the engine and transmission, you feel every misfire through the entire car. Replacing the spark plugs eliminates the misfire, and improves the car's performance. This is just one example of how a seemingly unrelated condition can appear to be a transmission problem. via

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