synth vs. dino

[6doublefive321]

Originally Posted by TIGGER

From Mobile1;

on a small side note,have you guys seen the Mobile1 High mileage oil yet? They claim a 15,000 oil change and guarantee no damage to your engine although I'm sure there are some provisos,etc. Still that's nuts!

15,000 isn't that crazy. I drive a BMW car, and its computer monitors driving conditions, etc, and tells me when to change the oil. I change at 10,000 miles regardless of what it tells me, but the computer always tells me that it has 3 to 5k left before the recommended change! Granted the damn thing holds 6.9 quarts, but that's still amazing. Kind of debunks the 3k mile oil change myth, huh? There are numerous tests on taxi fleets, etc. that say there is no advantage to changing oil at 3k miles as opposed to say 7.5k.

[Amber Lamps]

Originally Posted by 6doublefive321

15,000 isn't that crazy. I drive a BMW car, and its computer monitors driving conditions, etc, and tells me when to change the oil. I change at 10,000 miles regardless of what it tells me, but the computer always tells me that it has 3 to 5k left before the recommended change! Granted the damn thing holds 6.9 quarts, but that's still amazing. Kind of debunks the 3k mile oil change myth, huh? There are numerous tests on taxi fleets, etc. that say there is no advantage to changing oil at 3k miles as opposed to say 7.5k.

True! I was mostly commenting on the guarantee part of it. I worked for Ashland and know for a fact that the 3000 mile oil change was nothing more than a marketing tool to get people into instant oil change places. I'm not sure but I don't think a single oem still reccomends lofs every 3000 miles. Even if they did,I'd still suspect it was at least partially a ploy to get people into their service bays for lofs!

[Cutty72]

1125R manual says change oil every 6,000 miles using synth. change filter every other.

[Amber Lamps]

Originally Posted by Cutty72

1125R manual says change oil every 6,000 miles using synth. change filter every other.

Ok question...do you have the BALLS to do it? J/K but Suzuki says about 3500 using dino juice and I can't bring myself to wait. Even tho' I KNOW it isn't necessary,I am so programmed to the 3000 mile change(if I wait even that long) that I get nervous when it's even close to that mileage! Amsoil promises 5 or 6000 but I always changed around 3000 when I used their product. That's why I mostly use Suzuki full synth,at least it's only $6qt. Plus I can't bring myself to not change the filter even tho' the manual says every 10,000 miles. Break the chains of our 3000 mile oppression brother! You can be savior that'll lead us into a new and brighter era!!! Cutty...Cutty...Cutty!!!

[Trip]

Honda recommends 4000 miles on the new 600rr, I do it more than that if I am doing track days, but if I am tooling around just street for more than 4000 miles I wait longer than 3000.

[marko138]

Originally Posted by 6doublefive321

15,000 isn't that crazy. I drive a BMW car, and its computer monitors driving conditions, etc, and tells me when to change the oil. I change at 10,000 miles regardless of what it tells me, but the computer always tells me that it has 3 to 5k left before the recommended change! Granted the damn thing holds 6.9 quarts, but that's still amazing. Kind of debunks the 3k mile oil change myth, huh? There are numerous tests on taxi fleets, etc. that say there is no advantage to changing oil at 3k miles as opposed to say 7.5k.

My father-in-law runs Amsoil 20,000 miles between changes...he also sends it out to get tested and every time it's come back they say it's good for more miles.

[Cutty72]

I probably will run it the 6K now with the synthetic.
Bought a case on sale for $7.50/qt. and that's the HD Screaming Eagle stuff.

But then again, it's only got 860 miles on it now, and it's getting it's second oil change.

[Amber Lamps]

Originally Posted by Cutty72

I probably will run it the 6K now with the synthetic.
Bought a case on sale for $7.50/qt. and that's the HD Screaming Eagle stuff.

But then again, it's only got 860 miles on it now, and it's getting it's second oil change.

I managed 2200 and changed my oil from Repsol $13 a liter to Mobile $7 a quart.

[ceo012384]

Originally Posted by 6doublefive321

15,000 isn't that crazy. I drive a BMW car, and its computer monitors driving conditions, etc, and tells me when to change the oil. I change at 10,000 miles regardless of what it tells me, but the computer always tells me that it has 3 to 5k left before the recommended change! Granted the damn thing holds 6.9 quarts, but that's still amazing. Kind of debunks the 3k mile oil change myth, huh? There are numerous tests on taxi fleets, etc. that say there is no advantage to changing oil at 3k miles as opposed to say 7.5k.

I'm sure the oil IS fine for that long... but there's something about it being so damn dirty when I change it after a couple track days that makes me feel better about changing it so often. Shit comes out wicked black.

[Amber Lamps]

Popular Mechanics,
A: Early synthetics got a bad reputation for leaking. This was because, despite the claims of the oil manufacturers, the seal-swell characteristics of the new synthetics were different from those of the mineral oils they replaced. If the seal-swell rate was lower, the seals shrank and oil leaked from crankshaft seals and rocker cover seals. If the rate was higher, the seals swelled a little extra and the engine was tight. Then if the owner changed back to mineral oil, or added a quart when no synthetic was to be had, things got really bad. The crank seals had become worn, in their turgid state, and then relaxed. The valve cover seals were compressed when swelled, and when the different oil was added, everything leaked like, well, an old English sports car.

Fortunately, the situation has improved; you should have no problem switching back and forth. Adding a quart of mineral oil to a crankcase full of synthetic will be fine. Read the fine print — a lot of the "synthetics" on the market are blends containing a substantial proportion of mineral oil.


And that's the reason for not switching back and forth! Btw apparently this is from the 60s or 70s.....