10w40 vs.15w50

[VegasChinois]

Getting ready to put oil in the project Daytona for the 1st time. The World of Triumph Site suggests 10w-50 full Synthetic. I can find both 10w-50 and 20w-50 but having a hard time deciding what's best. I ride all year around and sometimes it's down to 30deg F but in the summer it's often 110 deg F plus!! Any thoughts on this???

It's a Daytona 955i, 2000 Model Year.

THANX!!

[Speed3]

[QUOTE=VegasChinois;2425106]Getting ready to put oil in the project Daytona for the 1st time. The World of Triumph Site suggests 10w-50 full Synthetic. I can find both 10w-50 and 20w-50 but having a hard time deciding what's best. I ride all year around and sometimes it's down to 30deg F but in the summer it's often 110 deg F plus!! Any thoughts on this???

It's a Daytona 955i, 2000 Model Year.

Split the difference, and get a jug of Mobil 1 15/50 from Wal Mart. You can't go wrong. Ive used it for many 1000's of miles.

[VegasChinois]

[quote=Speed3;2425124]

Originally Posted by VegasChinois

Getting ready to put oil in the project Daytona for the 1st time. The World of Triumph Site suggests 10w-50 full Synthetic. I can find both 10w-50 and 20w-50 but having a hard time deciding what's best. I ride all year around and sometimes it's down to 30deg F but in the summer it's often 110 deg F plus!! Any thoughts on this???

It's a Daytona 955i, 2000 Model Year.

Split the difference, and get a jug of Mobil 1 15/50 from Wal Mart. You can't go wrong. Ive used it for many 1000's of miles.

Alright Speed-will head down to Wally World!!
Is that Motorcycle Oil or Car Oil or does it really matter in spite of all the JASCO BS??
THANX!!!

[Speed3]

[quote=VegasChinois;2425128]

Originally Posted by Speed3

Alright Speed-will head down to Wally World!!
Is that Motorcycle Oil or Car Oil or does it really matter in spite of all the JASCO BS??
THANX!!!

if it's in a car, it's car oil. If it's in a Motorcycle, it's motorcycle oil!!!!!!!!!!!!

[bira]

FWIW, you REALLY shouldn't use car oil in a motorcycle with a wet clutch. Having said that, do what you want...

[reddog6]

2002 Sprint
Switched to 10-40 Mobil 1 was using 15-50, now on 5th oil change with 10-40.
Shifts better, revs faster. no change in running temp.
Cheaper and easier to find than 15-40.
Walmart stocks it
Dave

[moonshinerunner]

I use a 10/30W. The reason being is for better fuel economy, quicker revs etc. Semi synthetic. The recommend oil for my bike is Mobil 1 but here in Australia for 4 litres it is $100.00. I can buy other brands for around $38.00 for five litres.
A thicker oil would be good in summer here in Australia (plus 48 degree Celsius, 118.4 degree Fahrenheit) but my bike seems to like the thinner oil but I suppose as it gets more and more km's (miles) on it the thicker oil would help with clearances. It only has 100,000km's (60,000miles so far) I really think it depends on how you ride(hard or just cruising) and what temperature you mostly ride in and condition of the bikes engine.

[exlimeydedbt]

best of both worlds? My Bonnie manul says 10-40 or 20-50 I use two quorts of 10-40, two quorts of 20-50 Amsoil bike oil

[Sayantsi]

A couple people have mentioned the Shell Rotella T, the inexpensive but great alternative to motorcycle branded oils. It's also all I use and is great for bikes. As long as you don't have an energy conserving oil you are okay, but not all oils have the extra additives that are important for motorcycles. Rotella T does, and its been analyzed for it as well.

If you really want to know what works and what is going on in your engine, the only thing to do is get a used oil analysis done. In the USA, I recommend getting a free kit from Blackstone Labs. Simply grab some of the old oil while its draining and mail it off. For $30 you will know exactly how your engine is wearing and if you can modify your oil change intervals. I also recommend getting a TBN done the first time so you can see just how much life your oil has left in it. This will save you a lot of time and money from unnecessary oil changes.

Oil weights are pretty close already. While a thicker oil will feel cushier, the difference between a 40 and a 50 is minimal.

[Sayantsi]

Originally Posted by exlimeydedbt

best of both worlds? My Bonnie manul says 10-40 or 20-50 I use two quorts of 10-40, two quorts of 20-50 Amsoil bike oil

Fwiw, this is needlessly complicated and doesn't really benefit the bike. Between 40 and 50 weight, there isn't much difference so blending them isn't getting you anything special, and the same goes for the cold viscosity.

Just stick with one weight and make things simpler for yourself.