mine is ok when hot-just noisy when cold-and in this frost its even worse lol-just a tad worried that if valves are not closing properly etc can that burn a valve out?
Originally Posted by ALi-B
Last bottle I looked at was just various detergents and viscosity improvers.
You get the same from changing the oil more often. Which lack of regular oil changes is the usual cause of the problem in the first place - especially on the iron block zetecs, where IMO Ford's service intervals were pushing the limits of the recommended oils they used. When Ford switched to the thinner oils to address pump up issues, it didn't help matters. As the thicker oils they used to use were better at keeping them quiet when hot.