tried it in a TD 1.6 .... the turbo didn't like the thicker oil and didn't spool up as quickly....
thats why some people have thought of making a closed loop setup just for the turbo... the thinner the oil the faster the spool
i've always used lucas automatic transmission fluid whenever helping someone change their fluid out. that stuff is amazing! it's thicker though so it isn't a good idea to start and go when its really cold out. better to let the car idle for 30-60 seconds, although the oil sticks to the gears and so it shouldn't be too big of a deal... the only problem is that it is in fact thicker, and will net you worse mileage. a better solution would be to use an oil with a friction modifier. i have some of the oil extreme additive and have yet to try it, but am just itching :lol: maybe when the time is right.
www.oilextreme.com check it out.
as for the lucas foaming up... i highly doubt that! if their oil is foaming up from the lucas, they must have much worse problems!
royal purple is a pretty amazing oil. it actually polishes metal surfaces. sticky lifters is a really bad problem with all hydraulic diesels... even using high quality oil mine sticks a bit... maybe i'll have to buy some royal purple

if any Canadians are looking to get some royal purple here's a site. they also sell diesel purge
http://www.precisiontuning.ca/catalog/product_info.php?cPath=43_47_52&products_id=94
The foaming I have heard is if you mix Lucas with SOME of the pure synthetic oils. I believe the one in question is Mobil 1. My brother in law had foaming in one of his units and that is what he narrowed it down to. Reasoning he had was the lucas oil has a moly lube in it >>I think<< and the mobil has an additive in it that doesn't like the moly.
He said that you could put the two together in a jar shake and make butter. I just don't know for sure which oil combinations it was. But I guess his moral of the story was that some additive packages don't mix....I never personally watched the process though just what I have heard.
http://www.royalpurple.no/mobiltestrp.htm
micropolishing FTW!
That is good stuff for sure.
I ran it on one oil change but didn't put it back in due to the ring issue I seem to have now. No need in burning $7.+ pr qt oil.
I'm waiting for it to SMS so I can see how long you can drive with no gear oil Twisted Evil
About 100miles at 80-90mph
I'm waiting for it to SMS so I can see how long you can drive with no gear oil Twisted Evil
About 100miles at 80-90mph 
That's good news. Should be enough to get me home
lucas made a stabilizer for synthetic oils its in a diff bottle ive never used it ive herd its good tho it might fix that foaming that you guys are talking about