It is obvious that some of you, while badmouthing SynLube are starting yet another thread ! Interesting, is that a masochist thing ?
Anyway my car had SynLube installed at I believe 600 miles or so back in November 1979 and the oil was changed only once at 90,000 miles and the test is from when I changed the oil filter and the sample was from the filter, so theoretically the worst possible as the filter is almost horizontal and has to be rotated to get it off so any stuff that settled on what would have been the "bottom side" got mixed up when removing the filter.
Still the mileage was
FIAT X1/9 @ 173,055 Miles on 2/20/2010 = 83,005 miles on the SynLube since 1988 !
So it is not 13K or what ever someone stated by REALLY 83,000 miles.
As for the "multi" oil this is the explanation:
The INITIAL FILL is 33% by volume colloids, PTFE, Graphite, Moly and the oil looks like thick black paint when poured out from the bottle at 70 F or so.
I have drained "warm" oil form few vehicles over the years and the FORD OEM oil even "warm" pours out like water, the SynLube of course I do not drain out, but the filter when I removed it was too hot to touch so I used a wrench to get it off, and the SynLube was still quite viscous but not much different from "cold".
SO the INITIAL FILL is used ONLY once when you put it in the vehicle FIRST, then when some oil inevitably gets consumed, as the LIQUID portion burns, the ADD OIL (Used to be called X-tra) is used to replenish the oil level.
In my case depending how I drive it is 6,000 to 10,000 miles or about 2 years when I need to add about total of 1 Liter (usually add only about 200 to 250 cc at a time).
The ADD OIL is slightly grayish and lot less viscous, it is only the PAO with additives I am told.
I have oil temperature gauge on the FIAT X1/9 and YUGO, it is not unusual to have it in 260 to 280 F range, I have installed them After I got Maserati Q porte that had one, and while the coolant was 190 F the motor oil would go past 320 F on the gauge going up Baker Grade to Las Vegas on I-15 every time !
I think Italians can not design engines that do not ruin oil, so may be that is why AGIP was one of the first companies to have Synthetic Oil - anyway that is another story, but in the Q porte SynLube reduced the peak temperature by about 40 to 50 F on the same incline at 90 MPH (about 105 F in the shade if there was one) so that INSTANTLY was a proof to me that it does something that no other oil does, I had CASTROL, MOTUL and MOBIL 1 in the Q porte and used to change the oil every 2,500 miles - absolutely no difference in the peak temperature - but with SynLube I thought at first that the gauge did n0to work properly, it was so much difference.
When I got the YUGO which was not new I have also ran on CASTROL for a change or two, installed VDO temp gauge instead of the drain plug and to my surprise the YUGO got almost to the same temperature on the same incline (at 82 MPH) as the Q porte used to at 90 MPH – 320 F on the gauge !!!
It was probably almost year later that I drove the YUGO the same was but this time with SynLube and the temp was at 250 F (normally it is about 220 when engine is warm) so what a difference !
I have also found out that Motor Oil temperature at least on the Italian engines rises dramatically with “LOAD” like “up hill, while on FORD or GM it only goes up with engine speed, i.e RPM make it hot but not any difference up hill
No idea why and so far no one has answered that, care comment on that ?
Also the Motor oil is 20 to 50 F hotter than the coolant on all cars I had that had both gauges that I could consider reliable (VDO and not the OEM).
