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Time to Change

Ok here it is from the start; I managed to find an '05 Screamin' Eagle FatBoy that less than 100km (60 miles) on the clock. After dumping all the oils and gas along with the battery I've done the first service at 1600km (1000 mile) with Syn3, now I'm ready to change the oils again. I've got Mobile 1 V-Twin for the crank case, Spectro heavy duty primary and Spectro Platinum gear oil as I've only got 5 speed box. So here it is, can I just dump the Syn3 and put the new oil in?:)
 
But not the other way around?
I've read somewhere that once you've used Synthetic oil you can not go back to mineral. (without flushing I suppose)
Is that true?
 
You can switch between synthetic and dino, back & forth, all you want- the oils are 100% compatible. You can also change brands as often as the mood strikes.
This can be verified at any oil manufacturer's website. :s
 
IS MOBIL 1 OK,INSTEAD OF MOBIL 1 V TWIN,because I'm likeing what I hear about synthetics,and the v twin is scarcer than rocking horse {edited} hereabouts.The mobil 1 is a 15/50.:bigsmiley24:
 
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Mobil 1 is used by many people but the V Twin has a different additive package that is for air cooled engines. I use the V Twin.

Also the Mobil 1 (non V Twin) is a different weight than the V Twin, It's a lower viscosity.

15/50 vs 20/50

With the variations in temps in an air cooled engine, I would prefer the heavier viscosity.
 
IS MOBIL 1 OK,INSTEAD OF MOBIL 1 V TWIN,because I'm likeing what I hear about synthetics,and the v twin is scarcer than rocking horse {edited} hereabouts.The mobil 1 is a 15/50.:bigsmiley24:

I've used the M1 15W-50 in my bikes and it works well. It's very popular with air-cooled engine owners in both the H-D and BMW camps.
Here is a virgin oil sample from M1 15W-50 and M1 V-Twin. Fairly comparable, and either will protect your engine more than adequately...

Silicon: M1 15W-50: 9ppm-----M1 V-Twin 20W-50:10ppm
Boron: M1 15W-50: 228ppm-----M1 V-Twin 20W-50: 188ppm
Sodium: M1 15W-50: 13ppm-----M1 V-Twin 20W-50: 3ppm
Magnesium: M1 15W-50: 43ppm-----M1 V-Twin 20W-50: 538ppm
Calcium: M1 15W-50: 2464ppm-----M1 V-Twin 20W-50: 1899ppm
Phosphorus: M1 15W-50: 1193ppm-----M1 V-Twin 20W-50: 1142ppm
Zinc: M1 15W-50: 1315ppm-----M1 V-Twin 20W-50: 1352ppm
Molybdenum: M1 15W-50: 90ppm-----M1 V-Twin 20W-50: 0ppm
 
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