I forgot my previous question.
What differences will I have on use of XD50 and XD100, (correctly set computer), besides obviously price, on the following:
1- Fuel consumption
2- Oil consumption
3- Maintnance, service frequency, carbon pileup, etc
4- Engine life expectancy at nomal sport fishing use on large lakes.
5- Lubricating efficiency of each oil.
Any differences worth commenting.
As a rule of thumb, you will have less carbon buildup internally using the synthetic XD-100 oil and it also is a higher quality oil for less wear and tear on your motor. It will probably not affect fuel use, though. With the motor set to the XD-100 oil setting, you will use less oil than at the TC-W3 programming. Oil use is computer controlled and dependent on how you run your motor - high speeds, more oil - hard accelerations, more oil - lots of trolling or slow speeds, much less oil burned.
The XD-100 has better lubricity as it can be used at a reduced rate. As for engine life, I see 2000 hr. and up E-TECs using both oils.
The factory suggests using XD-100 at the TC-W3 setting if used commercially, for high performance, or heavy duty use such as pushing barges, etc.
The choice is yours.
XD-100 is the absolute best oil to use in any late model Johnson or Evinrude.
If you have an older Evinrude, it may be beneficial to decarbonize the motor first following the directions on the can of Evinrude Engine Tuner. If you have an E-TEC, then just add the XD-100 when the oil tank gets real low.
Saw answer posted elsewhere, will be using XD100 on XD50 setting. With the small amount of oil I use the extra protection should be well worth the little bit of added cost.
Yes, not only do you get the benefit of more anti-wear protection but the engine will have less of a chance of developing internal rust and corrosion when it is not in use.