Best Oil Brands Pro/Cons

Roy Gavin

Well travelled
And the very best base stock is M1 , which is where I came in.
Castrol does not sell a synth oil, only synthetically modified dino, so have a good read of these spec sheets again!
Nor does synth come out of the ground, the clue is in the name, again read the literature!
 

Pegasus

Getting there...
Location
GB
Who says M1 is the BEST base stock?! Penrite blend a combination of Group IV and Group V base stocks to arrive at their determination of the best synthetic formulation. Other manufacturers arrive at their formulation by whatever drives their product development, most often retail price!
Castrol do not produce a motorcycle synthetic, but they do produce automotive synthetics. I do admit that it is a long time since I last reviewed their product range and specs as I've never been impressed by their stuff.
Synthetics don't come out of the ground, really? You do surprise me..........................not!!
I was talking about those oil companies that do exploration, well production, refining and, produce retail oil products etc. There are relatively few of those, not surprisingly, compared to retail product companies that specialise in blending to serve a retail market. I didn't intend to infer that synthetics come from the earth, excuse me if I did.
Anyway, after more than 20 years of experience using Penrite stuff, I know where my pound will continue to go for my future oil needs.
 

Roy Gavin

Well travelled
The UOA's which people post on BITOG show results for M1 that no one else can achieve, it really is that simple!
But equal to the best is probably a safer claim, not everyone analyses their used oil so some may slip through the system.
 

DaveinHutto

Getting there...
Location
Hutto, Texas
The oil thread!!!!
been my experience, synthetics well get you maybe 5K miles (8KM) between changes with a liquid cooled bike. You can feel the shifts are not as smooth after it breaks down. Air cooled I would say 3K miles (4800 KM) you well notice it in the shifts. Because it changes out so frequently you can get by with automotive oils. If you can't find 50W you can do 40W. If your in the desert or like me here in the southwest semi arid region you find they carry the 50W , cooler climates due to its heavy weight its harder to find, less call for it. cooler temps require thinner oils.
The key is clean oil, i have had several bike with over 100K on them , fresh oil is what I used and what ever was handy that was close to preferred weight. Oil filters need love to.
The oil Thread! ;-)
 

imnvegas

Well travelled
Zinc was a lubricant designed for older (you would say classic) cars and currently for diesel engines. Modern cars do not need it as an additive. I had to use Shell Rotella for diesel engines in my 64 Corvair ( it needed the zinc) which was my daily driver for over 8 years.

darla.jpg
 

supercub

Getting there...
Location
Old Saybrook, CT
I like the Motul 10w50 I brought in a 4L jug. The pour spout pulls out of the jug making pours real easy, and there is a slight window on the side, graduated, I got the fill spot on the first time.
 

GrahamB

Getting there...
Location
Tenterden, UK
Last week I put Silkolene oil in. I bought the bike second hand so I've no idea what was in it before but I now have a new bike! The gear change is sooooo smooth and the engine is sooooo quiet I'm now thinking of changing the exhausts!
 

Roy Gavin

Well travelled
Old oil was probably getting low, so now you know what it feels like when it does!
What weight was the Silkolene?
I am using the 10/60 Repsol which gave me similar results, when filled to level, and at 43000 km it is starting to use a little.
 

GrahamB

Getting there...
Location
Tenterden, UK
I used 10/50. The old oil level was fine but came out like sludge and the drain plug magnet had a little more metal on it than I was expecting.

I'd bought the bike second hand with a full service history (Two services) plus receipts. However, the tappets had clearly never been checked and adjusted. I suspect the oil was something cheap as well.
 
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