cliffyk

These are the "Common Reasons Technicians use SEAFOAM..." from their website--all of them generally the result of very poor maintenance and/or extremely high mileage.[/align][/align]Which of these problems are you experiencing? If none of the above then keep thatcrap away from your car as it will at best do nothing, and at worst screw something up. [/align][/align]Seafoam was developed back in the 1930s for use in marine engines that typically run cold and often sit unused for months during the winter (hence the product's name). Under those running and storage conditions, and with the lesser quality fuels and lubricants of those days,it was common for carburetors and intake valves to fill up with all sorts of crap--pouring a mixture of kerosene and more volatile solvents into the intake would very often dissolve the crap and make the motor run better.[/align][/align]Properly maintained modern automobile engines, using modern lubricants and fuel, do not need this sort of "mechanic-in-a-can" snake-oil--ever. We generally run our cars up to 200k to 300k miles (I had 325k on my '90 Miata, the last 100k supercharged) and I have never had any need for Seafoam or any other of the magic potions you'll see on the shelf at your FLAPS...[/align][/align]

mustangman02232

why? i switched my old camaro over to full syn at 190k and when i got rid of it at 220k it still ran like a bear and didnt burn a drop of oil

seafoam combined with WOT acceleration does do the motor good, its best to start at 50-75k and then do it every 15k afterwards

Mjaga251

Because any bad seals or seals with slight cracks are being held together and in place by the sludge of the thicker non-synthetic oil.
Synthetic is thinner, and made to clean out sludge. Once the sludge is removed from these old seals, leaks usually, not always, will begin to appear.