Hydrocruiser

Well assuming all is well it's possible that the 20W-50 MObil-1 is too think as he was fine with 25W-40.
??

Maybe he has tight tolerances??

Check this out..

http://www.westernfilter.com/filtration_basics.htm

convincor253

All is well. Made a long run this weekend with no problems. At 3200 r.p.m.'s my oil pressure on the starboard motor was 45 lbs. and my oil temperature was 185 degrees. That is OK but the Mobil 1 added 5 degrees of temp and reduced the oil pressure by 5 lbs.. My port motor has always had less oil pressure (10 lbs. less) than my starboard motor. I have not changed out the Mercury oil (25W40) from the port motor. I am trying to figure out what oil filter to use and if the Mobil 1 V-Twin 2-W50 is the right oil for my stock 502/415 motors. My Mercruiser motors have 114 hours on them. To my knowledge the tolerences are stock from the factory. I did notice when I started the motors yesterday the one with Mobil 1 got oil pressure faster than the one with Mercury oil.

My questions are: Should I stick with the Mobil 1 V-Twin 20W50? And, which oil filter should I use? If the Purolator Prem Plus is OK, I will go with that one. I need to get the port motor oil changed and the correct filters on both motors this week as I am running in a long Poker Run on Saturday. Let me know if you have any other questions.
Thanks for your help.

Badtoon

Your V-Twin is designed for Air Cooled Engines would that effect how it performs in liquid cooled engines?


WELL

Hydrocruiser

Try a Fram HP filter...they flow twice as much and still filter 15 microns.

HP4..Short
HP 12..tall

This is your solution. let us know how it goes.

Hydrocruiser

..but the stories we are getting show it protects main bearings upon teardown very well.

convincor253

The FRM-HP4 has too much height to fit my motors. The filter base faces down with the filter hanging under it which doesn't allow much space for a longer filter. I had to go to the Mobil 1-111 as the M1-302 was too long. What is your next suggestion? You did not mention using any other oil, so am I to assume the 20W50 V-Twin is still the best choice?
Sorry to be so much trouble but I don't want to screw up my motors.

vandy021

Ok... I have read through this thread and I see a lot of good answers, but not one that has hit this problem right on the head. This answer works, for automobiles, commercial diesel engines, and marine. I have found this problem several times in the commercial and automobile sector as well as the marine. Most people have been using 15w50 for almost 20 years on marine engines even though they have said not too. Any engine that is using a fully synthetic is going to have reduced oil temperatures and oil pressure.

- In diesel engine aps. the engine can loose almost 20lbs of oil pressure at idle. The Delvac 1 flows at a 0W40 weight even thought it's called a 5w40.

- In marine/automotive, the 15w50 actually flows at a 5w in cold start up as well as the 20w50. The 20w 50 runs between a 10 and 15 weight.

Many people are alarmed when they switch to synthetics when they see these changes. Your engine is running more efficiently, you are using less energy to crank the motor and the additives are dispersing the heat differently. I have been on many class like this with my ExxonMobil sales engineers. We see this kind of thing everyday. You souldn't see a gain in temp. As well, as if you see of any test or testominal not done by ExxonMobil or an apporved ExxonMobil test, most likely there might be inconsistenices in the results

Hydrocruiser

Keep us filled in.

mr_velocity

I replumbed my motors so I could run the HP6 filters. I like what I have seen and heard about the V-Twin oil, I am a huge fan of RedLine. I think either way you're going to be a lot better off than running other oils.

Hydrocruiser

Now it's getting the best oil filtration system going and I think going duallys is worth a thought.