The OEM 392 plugs are an NGK LZTR6AP11EG, the OEM 5.7 plugs are a copper NGK LZFR5C–11 and that is a hotter plug than the 392, the 392 heat range is "6" which is one cooler than the 5.7's "5." According to his magic computer, the 30,000 mile service does not include spark plug replacement. Just had my plugs changed at 30,000. All we're looking at are plugs that needed to be changed -- certainly no cause for concern. Openbay is an online source that connects you with multiple auto service professionals nearby who will compete for your auto repair and maintenance business Plus, if you figure a motorcycle plug fires four times as much as a auto engine, you arrive at 7,500 miles. NGK states the expected life of the IX plug to be the same as standard nickel-plated, copper core plugs. Replace the spark plugs (5.7L Engine). Combining with the automatic oil change indicator system, your vehicle will require servicing at 10,000-mile intervals. We Back It. Replace the engine air cleaner filter. Adjust parking brake on vehicles equipped with four-wheel disc brakes. I stopped at the stealership yesterday to get a price. Here, an oil change is $89.99, but a 4 oil change … Who better to protect your vehicle than the company who built your vehicle? Rotate the tires, rotate at the first sign of irregular wear, even if it occurs before 96,000 miles (156 000 km). 30,000 Miles (50,000 km) or 30 Months Maintenance Service Schedule Change the engine oil and engine oil filter. I presently have about 26,000 on my 5.7 auto. Replace the air conditioning filter. I have 1,000 on mine now so that's why I asked. I checked again in the manual to make sure I was right. I suspect the reduced change interval came from California. Replace the spark plugs (5.7L Engine). Replace the spark plugs (3.6L Engine). Replace the engine air cleaner filter. The requirement for the 5.7 is a spark plug change at 30K. Also, as mentioned, changing the valve cover gaskets and spark plug tube seals is in order, but fair warning -- the passenger's side is a pain in the butt. Mopar ® Vehicle Protection is the only service contract provider backed by FCA and honored at all Chrysler, Dodge, Jeep ®, Ram and FIAT ® dealerships across North America. Change the engine oil and engine oil filter. We have a couple of guys who own SRT's and Vipers and both recommend doing the first change at 3,000 miles, and an interval of 5,000 after that. Have peace of mind knowing your vehicle is being serviced by factory-trained technicians using certified Mopar parts. Asked the dealer about changing to a platinum plug to avoid the 30,000 mile change and was told that the plug used in the 5.7 Hemi is made by NJK for that engine, and only that engine, and that changing to a platinum will lead to nothing but troubles. 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