Not an oil question

[kwallace21]

Ok, maybe just a bit.
Just had my 2011 twin cam GSA dealer serviced for its 6k.
Noticed the previous service last year it had Castrol power 1racing 10/40 fully synthetic but apparently the new recommended oil is Power 1 15/50 semi synthetic which was used at my service. I'm not really bothered as to be honest I always thought fully synthetic oil in a boxer was a waste of money. Even though its a twin cam I'd be happy enough with the old Act Evo mineral.
Has anyone recently had this semi 15/50 oil used by their dealer.
Just curious as to to why manufacturers constantly change recommendations.
There, not really an oil question as I don't give a shit as long as its not cooking oil in my sump.
I await the usual abuse.
Kev

 

[Bendy toy]

I don't give a shit as long as its not cooking oil in my sump.

Vege in the sump might not be so bad -

http://www.hort.purdue.edu/newcrop/ncnu02/v5-029.html

 

[Deleted account 181015003]

Castrol website different again

http://www.castrol.com/castrol/sectionbodycopy.do?categoryId=9024084&contentId=7073092

 

[kwallace21]

And here was me thinking I'd start a massive oil thread.
Foiled again.
What do the numbers mean. 15/50 ? Buggered if I know.

 

[cookie]

What do the numbers mean. 15/50 ? Buggered if I know.

it means it has the viscosity of a 15w oil, but the protection of a 50w.

 

[Bendy toy]

15w means you cant see where you are going but when it warms up its like a 50w so you can see.

Hope that helps.

 

[jeff]

I had the opposite experience. Semi-synthetic up to first service when full synthetic used. Didn't use a drop of synthetic but used a fair bit of the full synthetic. Back on semi at last service at my request, not used a drop.

Bike used travelling to and fro Crete so used a lot in hot temps. (BMW specify 20-50 mineral in Greece albeit with more frequent oil changes.

In my opinion full synthetic is a waste of money on an ancient air cooled twin design

 

[Bendy toy]

IMO full synth is a waste on most engines designed before 2000 and anything air cooled. Its just too thin. I used it in a VW TDI and it burnt oil like a 2 stroke. There was almost no oil use on semi synth. My Diversion 900 also used oil on full synth but not on semi.

 

[Schtum]

I used it in a VW TDI and it burnt oil like a 2 stroke. There was almost no oil use on semi synth.

Tell me this wasn't a post 2000 TDI PD.....

 

[Bendy toy]

Tell me this wasn't a post 2000 TDI PD.....

My 2002 PD 130 (Audi A4) had the "standard" long life oil and was sold showing 22K just after its first service. The car in question was a 1995 Passat 1.9/90. Bought showing 33K. Sold with 115K when I bought the Audi.

 

[Schtum]

My 2002 PD (Aud A4) had the "standard" long life oil and was sold showing 22K just after its first service.

Which in that case would be fully synth to VAG spec 506.01.