Re: oil change intervals

Regarding your information regarding oil change intervals: I have been using synthetic oil in all my vehicles for about 10 years now. Synthetic oils are VASTLY superior to regular motor oils, and outperfom them in ALL ways! Synthetic oil does not thicken and turn to sludge in high heat conditions. Nor does it turn to jelly in sub zero temperatures. Synthetic oil does not deteriorate like regular motor oil. Synthetic oil DOES however retain dirt , just like regular motor oil. Therefore, I change my synthetic oil only once a year, however, I change the filter twice a year, and re use the oil that is trapped in the filter. It simply gets dumped back in through the valve cover cap. My vehicles include a 1956 MGA roadster (My pride and joy) A 1990 Ford Tempo (wife's car) and a 1994 Toyota Camry (poor man's Rolls Royce) All these vehicles have been running syntheic oil for the last 10 years, with oil changes only once a year, and filters changed twice a year. These engines run as well and as strongly as 10 years ago! I have had NO engine problems whatsoever. The MGA that I have owned for 25 years needed regular valve adjustments when using regular motor oil. Since switching to synthetic oil, I have not needed to adjust the valves, because the rocker shaft and rocker arms are not wearing! I attribute this solely to the synthetic oil, and highly recommend it. The only time I would not recommend use of synthetic oil is during new engine break in, or if an old engine has been using non detergent motor oil for many years. Cheers! snipped-for-privacy@operamail.com