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[Twolanerider]

I don't understand how HDI raised the oil change interval to 5000 miles with SYN3 knowing they have a problem.

Because it's a legitimate interval for good synthetics and they couldn't admit the inadequacy that would result from looking bad in comparison.......

[RJ749]

I don't understand how HDI raised the oil change interval to 5000 miles with SYN3 knowing they have a problem.

I don't know that they realized they had a problem until so many of us started using it.  But they certainly are beginning to now.

[Midnight Rider]

Because it's a legitimate interval for good synthetics and they couldn't admit the inadequacy that would result from looking bad in comparison.......

Yeah...what he ^ says....5K is the LEAST amount of miles you can get out of a high quality synthetic. I ran the syn3 for the break-in on the bike.  In a car, you can easily get more, but on the air cooled V's I feel better changing every 5K.

It was hard to wean myself off of Castrol GTX, which I've been using for the past 30 plus years, but I'm a believer now.

[ggraves427]

Syn3 works great in all three holes, septic tank, sewer, waste oil dump behind Auto Zone . A HD tech told me to get rid of it.

[grc]

Totally agree with your thinking there, Dood, and if I ever do the cams/gear drive on my bike, I will do the pump as well.  [highlight]Since I'm running the Mobil 1 20W50, I wonder if that is what is keeping my pressure off the zero mark?[/highlight]  Let me know if you notice any difference in pressures when you change over from the syn3 in your higher pressure system.  Just curious, but it might be interesting to make a note of your PSI's before and after.

You are making a smart move dumping the syn3.... [smiley=xyxthumbs.gif] [smiley=xyxthumbs.gif]

I know you've done your reading on here before making that decision  

TC & 'd00d,

I ran my SEEG with the SYN3 for the first 1k miles (April - cool weather), and the oil pressure never dropped below approximately 10 psi on the gauge at idle.  I switched to Mobil 1 at the first service, and my oil pressure at idle, even during the recent heat wave, has never dropped below about 11-12 psi in the subsequent 9k miles.

It was common on Evo's and earlier engines to have zero pressure at hot idle.  The Twin Cam oil pump design improved that to about 8-10 psi on average.  Ideally, I would like to have at least 15 psi at all times, since it takes that amount for the piston cooling jets to kick in, but I'm not concerned enough to tear into the engine at this point in time.  If I go in later to do cams, or just to peek at the tensioners for piece of mind, I may seriously consider the Fueling pump.

Jerry

[MJZ]

OK, you have gotten my attention. I am going to stop by Autozone on my way home. I called they have both Redline and Mobil 1 in stock. What seems to be the general opinion, Redline choice #1?
Going to change both the SEEG and SED tonight. What do you think, 4 (crankcase), 1 ea. for the tranny and primary?

Thanks for the input,
Mark Z.

[Fired00d]

From what I remember the quantities are:

Motor Oil - 4 quarts
Primary - 32 oz
Tranny - 20 - 24 oz

 [smiley=pumpkin.gif]
Ride Safe,
Fired00d
 [smiley=fireman.gif]

[MJZ]

Thanks d00d, I off to Autozone. [smiley=xyxthumbs.gif]

[Midnight Rider]

Jerry...thanks for that bit of information...it was relatively cooler when I put the first 1K on the bike...80 to 85, instead of 95 - 100 as it's been lately. It's kinda hard to get a real precise reading on the gauge, but the Mobil 1 seems to be running about what your observations are, best I can tell.  When I was coming back from NC over the 4th, it was 100 degrees (according to some of the town's bank thermometers), two up, loaded bags and tour pak, and I never saw it drop below the points you're talking about...10 - 15 psi...and it was HOTTTTTTTTT!!!

MJZ....Dood is right on with the fluid amounts.  All I can personally attest to is the Mobil 1 20/50 vtwin, and it is good stuff.  Redline and Amsoil are also excellent products from what I've heard/read.  I was so convinced not to use the syn3 that when they changed my fluids for the 1K and refused to put my oil in there, I just drove it home and drained the chit out and put mine in,along with a K&N filter.  Warranty is not effected, though the stealer might tell you differently, as Mobil meets and EXCEEDS anything HD offers.

[BLM777]

I may seriously consider the Fueling pump.

Jerry

Honest...I don't work for Feuling, own any stock or get any commission, but the Feuling oil pump and Zippers bypass spring are the best single improvement I've made to a Twin Cam.  Last Sunday was 99 degrees and 89 humidity.  Stopped in traffic (a very common occurance down here in the swamp) was reading a constant 25psi at idle with Mobil 1. Didn't make me any cooler, but sure made me more comfortable about not cooking the motor.  Sorry for posting another Feuling commercial....

[Fired00d]

Honest...I don't work for Feuling, own any stock or get any commission, but the Feuling oil pump and Zippers bypass spring are the best single improvement I've made to a Twin Cam.  Last Sunday was 99 degrees and 89 humidity.  Stopped in traffic (a very common occurance down here in the swamp) was reading a constant 25psi at idle with Mobil 1. Didn't make me any cooler, but sure made me more comfortable about not cooking the motor.  Sorry for posting another Feuling commercial....

I definitely concur with that. I have a lot more peace of mind with this addition when the weather is like it has been around here lately. Ninety + degrees with forty – fifty % humidity makes heat index close to 100 if not above. Which makes it hot as the [smiley=devil.gif].

And to know that pressure will get better when I get rid of the Syn3. Outstanding!!!

 [smiley=pumpkin.gif]
Ride Safe,
Fired00d
 [smiley=fireman.gif]

[jimp]

This a serious accusation to make that HDI is promoting and installing a oil that damages my motor, I senserly hope that this is false.

[RJ749]

This a serious accusation to make that HDI is promoting and installing a oil that damages my motor, I senserly hope that this is false.

All I can say is my motor/trans sounded like dry bearings and grining metal coming off the mountains of Colorado any day it was over 80 which was all of them for the most part.  Guys with oil other than Syn3 had no issues and my bike is stock.

I figure when I mention it to a service manager and he says that is what he is hearing about it too, then its better safe than sorry and make the switch.  

[grc]

Honest...I don't work for Feuling, own any stock or get any commission, but the Feuling oil pump and Zippers bypass spring are the best single improvement I've made to a Twin Cam.  Last Sunday was 99 degrees and 89 humidity.  Stopped in traffic (a very common occurance down here in the swamp) was reading a constant 25psi at idle with Mobil 1. Didn't make me any cooler, but sure made me more comfortable about not cooking the motor.  Sorry for posting another Feuling commercial....

Don't worry about the commercial, when any of us find a great product it's only fitting that we share the info with our friends on this site. Fueling has received a lot of positive press since they introduced this product, and when you look at one of their pumps or their cam plate the quality is pretty obvious.

One question rattling around in my head concerning the oil pressure issue; is the stock TC oil pump capable of maintaining higher flow and pressure if you modify the bypass valve in the cam plate?  There is more than one company selling springs, plates, etc. to modify the bypass valve, but I've never heard anyone indicate what these things would do when matched up to a stock pump.  I'm guessing that if the stock bypass valve and spring were working properly, there probably wouldn't be much if any gain at low rpm.   [smiley=nixweiss.gif]

Jerry

[HWYMAN1]

As always enjoy opinions of people with experience and experts in field on maintaining engine at peak performance. Will change to Mobil1 ASAP.  I would like to use the K&N oil filter also, is the KN-171(Bor C) the one everyone is using or is there a different filter?