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#1
October 20th 2005, 16:54
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the reason that synthetic oil feels slicker is that its more refined and there are many additives into it in order to provide the viscocity properties.
Something that i havent confirmed yet but its been in my mind on the matter, is that a magnesium case (T1) is not of the high tolerance like an aluminum one like the T4. Thus, its molecular stucture is not so thick as in aluminum (plain words its like having more pores not only on the surface, but on the structure as well). This along with the more refined structure (thinner) of the synthetic oils can cause leaks. Im not the expert on the matter, but i have done a bit of reading. Currently im using Pennzoil 10-40 on my T1 and i can say that i dont have any oil burned up (no blue smoke or anything) and the oil my engine is loosing in my opinion is due to poor machining/worn out case/exploded rubbers on the stock oil cooler/ and blown head gaskets every once in a while (cos im not running breathers on the engine...)
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Aircooled 4ever 1973 1303 going towards GL 
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#2
October 21st 2005, 02:30
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Jake has done testing of a few synth. oils. I asked him about it while I was building my engine up there. He said he recomended 3 oils, all 20w50's. They were Royal Purple, Redline, Valvoline full synth. The Red Line and Valvoline were very close in the testing and Royal Purple was just ahead of those 2. The test monitored head temp vs oil temp in the same engine under the same loads. The oil needs to be able to take on heat and then give it up in the cooler. Some syth. oil don't pick up heat (washing it from heads, etc) and others don't give up heat in the cooler. He runs Royal Purple in the 912E and Valvoline Full Synth. in the Bus. I run Valvoline Full Synth 20w50 in mine.
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NO_H2O 72 1302 Smack Black GL 73 Bus (2L CIS Powered) 66 Beetle, 73 Standard Beetle 72 Pinzgauer 710M Volksport Kafer Gruppe
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#3
October 25th 2005, 01:53
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#4
October 25th 2005, 07:44
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Hi, my engine is a mild 1776cc T1.
Stock 1600 dual port case Stock (69mm)crank-rods balanced for 10k rpm Engle FK110 (284 degrees if correct) Mahle Pistons/Cyls (90.5mm) 044 heads Autocraft style Bugpack bolt on rocker shafts 40mm dual Webers NO taping/drilling>>no full flow NO Breathers Stock element oil filter Stock doghouse oil cooler Petronix Ignitor +Coil electric fuel pump+ 3 fuel filters Custom exhaust made from kadron 4-1 header, a Group N muffler and some bends. Gearbox is the original 1303 1300cc one. I ve toped 160 km/h @6.2k rpm  Usually i drive the car hard on the streets, drifting in roundabouts and trying to beat the ricers when possible I change the oil 2-3 times per year. Consider that the car is driven only when im back home, like 5 months/year
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Aircooled 4ever 1973 1303 going towards GL
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#5
October 25th 2005, 08:09
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Mine is a type 1 2275, 94 bore x 82 stroke, full flowed, 30mm pump, 1.5 quart deep sump, external filter and cooler, AS41 case, CB SE heads, 9.7 to 1 comp. ratio, external breather box, 45 Dellorto DRLA's, Web Cam 122/125, Mallory Unilite, DTM type 1 shroud.
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NO_H2O 72 1302 Smack Black GL 73 Bus (2L CIS Powered) 66 Beetle, 73 Standard Beetle 72 Pinzgauer 710M Volksport Kafer Gruppe Last edited by NO_H2O; October 25th 2005 at 08:14.
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#6
October 27th 2005, 01:56
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#8
October 27th 2005, 01:54
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#9
October 25th 2005, 01:50
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