Mobil 1 Full Synthetic for V-Twins

[scott_araujo]

"Unit construction"?  What's that?

Scott

[ducpainter]

"Unit construction"?  What's that?

Scott

Now I know how old you aren't.

Unit construction refers to an engine and gearbox in the same cases.

It was a selling point of the 60s and 70s Triumphs and BSAs over Norton that used a separate gearbox.

It definitely poses different lube requirements.

[scott_araujo]

Yes, knew that but didn't know what it was called.  Yes, different when they're together in the same case.  Does Harley have the clutch in the engine case or is that out back in the tranny?

Scott

[ducpainter]

Yes, knew that but didn't know what it was called.  Yes, different when they're together in the same case.  Does Harley have the clutch in the engine case or is that out back in the tranny?

Scott

Harley clutches run in a separate primary case.

[scott_araujo]

Now that's three cases.  I'm back to confused 

Scott

[ducpainter]

Now that's three cases.  I'm back to confused 

Scott

Not as black and white as it seems eh?

[cduarte]

I prefer Shell Rotella T synthetic 5-40, it's an excellent oil and is rated for transmissions. It's also very inexpensive and is available at walmart and autozone.

[ducpainter]

I prefer Shell Rotella T synthetic 5-40, it's an excellent oil and is rated for transmissions. It's also very inexpensive and is available at walmart and autozone.

Back in the day

we worried about our 2 smoker trannys.

At the time the hot set up was Spectro Golden gear.

Keep in mind it was tranny/clutch only.

We ran 2T in the motors.

[Desert Dust]

El Centro?  There are some nice roads going up towards the mountains...

That's right! El Centro. Going up to Julian is a nice ride. Lately we've been riding on highway 94 towards Tecate. At this time of year, I'm a bit weary of ice patches on the way to Julian.  [moto]

[Desert Dust]

No!  Nooooo!!!!  Not another oil thread!!!!!



I do admit that part of the reason I use Mobil 1 is that it is more convenient and cheaper to get than synthetic moto oil.  Not much though on either count.  I also think that regular oil changes with anything decent are way more important than the specific brand/type/weight oil you use.  Just how I live my life.  You're free to do whatever you want.




How did I let myself get sucked into another oil thread 

Just a side question if anyone knows on the Mobil 1 V-twin....
Since Harley engines don't share the oil between engine and tranny, does this oil have any special shear qualities?

Scott

According to the declaration on the Mobil 1 container, the V-twin oil is designed for air-cooled engines, transmissions, and wet clutch primaries. Should we believe them I do agree, though, regular oil changes are a must. 

[deepak8612]

i use old bacon grease. makes me make the beast with two backsing hungry though 

[scott_araujo]

According to the declaration on the Mobil 1 container, the V-twin oil is designed for air-cooled engines, transmissions, and wet clutch primaries. Should we believe them I do agree, though, regular oil changes are a must. 

Well if it's not designed for Harley's at least it's being marketed to them.

[arai_speed]

i use old bacon grease. makes me make the beast with two backsing hungry though 

I used to use leather knee pucks...they would smoke up during use and they smelled like bacon afterward. 

[Howie]

A word of caution about using modern, non moto specific car oils.  The wet clutch issue is just one issue.  In the last few years, the EPA has mandated lower content of zinc and phosphorus in automotive oil needed for extreme pressure, like transmission gears and camshafts.  They have also reduced standards on temperature.   This means the oil designed for your car may not offer the same protection as moto specific oils.  Most of the tests on the interwebs were done before these changes took place.

[scott_araujo]

Good to know Howie.  Those compounds are really important in moto engines.  Guess I'll ahve to drive those few extra miles for moto oil next change.

Scott