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> OK, now I have a minute to write the story on Oil. > > First off.. the heavy oils will increase oil pressure but like trying to force molasses through a > crack they wont get through the bearing clearances easily and lubricate as well. With an older shot > engine the clearances are larger and it will help get that last few miles out of it but other than > this situation your doing more harm than good, and Jim is right they rob a little HP. > > Thin oils, 5W30 etc... these take less energy to pump and is why they are used on the newer cars.. to > get that last .5 MPG out of an engine for the certification. Modern engines are also close tolerance > and need an oil that can pass through more easily. Used in an old shot engine will give you squat > for oil pressure. If you live in the north or where its REALLY cold they are a good choice. > > Multi Vis.. originally our engines were designed for straight weight oils as the chemicals used to > make the multi-vis oils broke down more easily at the higher temps that air cooled engines run at. > 10W40 in those days was really more like 15W30 in reality too. Today special additives and viscosity > enhancers are used in the multi-vis oils and not in the straight weight so in order to take advantage > of the modern oils you should use the multi vis. > > Here in NY USA where we have hot summers and cold winters the best to use is 10W30 in the winter and > 10W40 in the summer, 20W50 if the engine is shot in the summer. You can use 30W in the summer but > your losing out on the modern technology. Anything else is a mistake. > > As for synthetics, our engines WERENT made for them. Some work and others don't, one that didn't > finished my motor off in 350 miles so its really not worth the crap shoot. Many that N £at they > do work don't have 100Kmi of synth use in their engines eather so they may be very mistaken and not > know it yet. One GUARENTEE for distruction is using a synthetic without full flow filtration as the > synths are very good in cleaning the crud out of crevices and without a filter recirculating it > through the bearings till they die. Any Synth oil rep will tell you this, but only if you ask.. it > doesn't warn you on the bottles!!! And our screens are just like no filter at all! > > Keith ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org