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    Clattering on startup with Recent Oil change

    03 F150 Harley Davidson (Supercharged 5.4) 55,000 miles All stock engine Got the truck around 25,000 miles. Been running Mobil 1 oil since then to about 52,000. Changed oil, Used Bosch Filter (last filter was Fram), Mobil 1 full synth 5W plus a bottle of VSOP which is Valvoline synthetic oil...
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    03 Harley Davidson F150. Is this a good combo?

    Ran Mobil 1 5W30 for 14,000 miles. From 12K to 14K a Full Q burned off. Truck does not see high loads. Changed oil to 5W30 M1 and 1 full bottle of Synpower oil treatment. Previous slight tick noise at idle is Gone. I swear its smoother. Oil pressure gauge is 1 section higher now. 500 miles and...
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    Built engine. less slap and less smoke now..

    4cyl built engine. Forged pistons on the loose side. Slaps at idle. Worse when cold. Broke in on 10/30 dino oil for 3k miles. Smoked the entire time. then 15/50 Mobil 1. Same smoke, same slap. Ran for 4k more. Then changed oil and parts store was out of 15 so I got 10/30 mobil 1. Half the...
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