Re: Seafoam for my 1996 f-150
Seaform is worth a shot for $10. There are a few ways to do it. I've never added it into my crankcase (not mixing stuff with my full synthetic oil!). As of late I've been using Amsoil powerfoam which is sprayed directly into the throttle body. Once the can is depleted (or about 1/3 to 1/2 can of seafoam sucked in through the brake vacuum line) shut the vehicle off and let it sit for a good fifteen minutes. Seafoam/Powerfoam break up the built up carbon in the valves, cylinder head. If a valve isn't seating correctly it can potentially free it up allowing better combustion.
It won't however fix any damage to stressed metal components. When you start the vehicle after 15min or so, it will smoke like something fierce and will take a few extra seconds to start. Best way to clean the vehicle out is right after you start it, keep it in second gear and find some 40mph roads with low population (they won't like the white smoke clouds).
Before ripping the valve covers off, give the spark plugs a quick inspection and make sure they're not fouled or have improper gap.
If you find yourself going past the oil change intervals, run a higher quality oil, or synthetic for that added piece of mind.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!