Anyone have experience using synthetic oil. I have a new Tahoe with 4.3 190 and am ready for the first oil change. I use Mobil 1 in everything from lawn mowers to SUV and have had no problems but Mercury says do not use in the owners manual.
I use mobil 1 in my boat, it is a 1991 3.0 Merc and haven't had any problems. My suggestion to you would be: use whatever merc says to use until your warranty is out. Merc has a pretty good synthetic, it is just more costly!
Has worked pretty well in my E150 for the last 192,000 miles. In fact it works so good I never even change it. Every 25k miles I change both oil filters, add two quarts and away I go. The 4.6l V-8 uses one quart in 6000 miles and carries about 12 -1500 lbs over gross vehicle weight. Is that what you were gettin at OC?Originally posted by Old Curmudgeon:<br /> AmsOil will sell you all the 0W-30 you can afford.
Keep in mind that Mercury Marine not only developed the Corrosion Salt Fog Test for FC-W marine rated oils, but they worked very closely with the NMMA in establishing parameters and procedures for the FC-W marine ratings. The Corrosion Salt Fog Test is one of the primary factors separating FC-W marine oils from automotive oils.<br /><br />The reasons Mercruiser did not recommend synthetic oils in the past were because some synthetic oils, particularly those with insoluble additives, were not adequate for marine use. And some synthetics provided inadequate corrosion protection for marine environments. Mercruiser recognized the advantages of synthetic and synthetic blend oils, thus their big involvement with FC-W. FC-W was one way to have synthetic oils meet the specific needs of marine use.<br /><br />Don has provided the information you need.
