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SN-95 and New Edge Mustangs
Which synthetic oil do you use?
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<blockquote data-quote="SnThetcOil" data-source="post: 4691941" data-attributes="member: 52200"><p>The drain intervals are recommended by the vehicle manufacturer and this is with using standard drain oils, be they synthetic or petroleum oils. A synthetic oil has the *potential* for extended drain intervals *if* it is specifically formulated to do so. If it is not, then attempting extended drain intervals could cause problems. For best results, follow the recommendations of the oil manufacturer. AMSOIL has recommended drain intervals up to 35,000 miles, Mobil now has a 15,000 mile oil available too.</p><p></p><p> As for using a synthetic gear lube in the differential, that is what Ford specifies and requires for your car, a GL-5 rated, 75W-140 synthetic gear lube. So whomever told you not to use synthetic gear lube because it is, "too thin", well, they may have some learnin' to do.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> </p><p></p><p> A synthetic gear lube in the viscosity 75W-140 is no thicker or thinner than a petroleum gear lube of the same viscosity. In fact, a synthetic lubricant will provide a far superior film of protection than a petroleum lubricant could ever hope to. Film strength is how much pressure it takes to force out a film of oil from between two metal parts and allow metal to metal wear. The film strength of even the best petroleum lubes is only about 500 psi, while the *best* synthetic lubricants, can have a film strength of over 3,000 psi! Not even close. It's like taking candy from a baby. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> </p><p></p><p> A top shelf synthetic lubricant will also be very wise to use in your transmission, but only if you want to obtain the benefits of reduced wear, cooler operating temperatures, longer transmission life, improved shifting, better performance/quicker acceleration and improved fuel economy. The choice is yours of course.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="SnThetcOil, post: 4691941, member: 52200"] The drain intervals are recommended by the vehicle manufacturer and this is with using standard drain oils, be they synthetic or petroleum oils. A synthetic oil has the *potential* for extended drain intervals *if* it is specifically formulated to do so. If it is not, then attempting extended drain intervals could cause problems. For best results, follow the recommendations of the oil manufacturer. AMSOIL has recommended drain intervals up to 35,000 miles, Mobil now has a 15,000 mile oil available too. As for using a synthetic gear lube in the differential, that is what Ford specifies and requires for your car, a GL-5 rated, 75W-140 synthetic gear lube. So whomever told you not to use synthetic gear lube because it is, "too thin", well, they may have some learnin' to do.:) A synthetic gear lube in the viscosity 75W-140 is no thicker or thinner than a petroleum gear lube of the same viscosity. In fact, a synthetic lubricant will provide a far superior film of protection than a petroleum lubricant could ever hope to. Film strength is how much pressure it takes to force out a film of oil from between two metal parts and allow metal to metal wear. The film strength of even the best petroleum lubes is only about 500 psi, while the *best* synthetic lubricants, can have a film strength of over 3,000 psi! Not even close. It's like taking candy from a baby. :) A top shelf synthetic lubricant will also be very wise to use in your transmission, but only if you want to obtain the benefits of reduced wear, cooler operating temperatures, longer transmission life, improved shifting, better performance/quicker acceleration and improved fuel economy. The choice is yours of course.:) [/QUOTE]
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Which synthetic oil do you use?
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