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97 vortec 5.7 question???
Got 350 vortec and changed oil for first time myself other day. I used 4 quarts of Pennzoil 5w 30 and added a quart of SLICK 50. Was wondering if this was a good idea or not?? Also I have 136,000 and a little miss at idle. Was wondering if there are any easy inexpensive tips to get her running better or idling better??? I have never replaced cap, rotor, plugs or wires. Is this necessary or not? Truck runs great but i wish it would idle better. Thanks for any tips.
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