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post #31 of 40 (permalink) Old 10-11-2011, 11:34 PM
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As was said earlier, talking about oil is like talking about religion - everyone has their own opinion and "sources" to support it.
That being said, glad to hear the Castrol is working good for you too; I'm having the same experience - no complaints using dealer installed Castrol.
I use Amsoil in my diesel truck and tractor and have no complaints there either.
I just can't imagine why a motorcycle company would risk their reputation and financial success by recommending a clearly inferior product. Yep, I understand sponsorships and "money changing hands", but that can't possible compare to the profit from increasing market share and selling more bikes without unnecessary claims.
I think it just reinforces the fact that most high quality oils with the same technical specs are comparable with little difference in performance IF changed regularly. Therefore there is room for different manufacturers to associate themselves with different brands for "marketing" reasons since performance doesn't really vary that much.
Just an opinion of course - isn't all of this?!

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post #32 of 40 (permalink) Old 10-12-2011, 12:24 AM
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Originally Posted by oldgreybull View Post
As was said earlier, talking about oil is like talking about religion - everyone has their own opinion and "sources" to support it.
That being said, glad to hear the Castrol is working good for you too; I'm having the same experience - no complaints using dealer installed Castrol.
I use Amsoil in my diesel truck and tractor and have no complaints there either.
I just can't imagine why a motorcycle company would risk their reputation and financial success by recommending a clearly inferior product. Yep, I understand sponsorships and "money changing hands", but that can't possible compare to the profit from increasing market share and selling more bikes without unnecessary claims.
I think it just reinforces the fact that most high quality oils with the same technical specs are comparable with little difference in performance IF changed regularly. Therefore there is room for different manufacturers to associate themselves with different brands for "marketing" reasons since performance doesn't really vary that much.
Just an opinion of course - isn't all of this?!
+1 I wonder if there is really much difference between the 10w40 and the 10w50. Advance Auto carries the Castrol Power in 10w40 and 20w50 for $9.69/qt but not 10w50 which the dealer gets $14.50/qt. Who knows. But I'll probably change my own oil next time I just like to have the dealer do the first service for warranty documentation. I think that all of the MC rated synthetic oils are about the same really. So, I shop for price.
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post #33 of 40 (permalink) Old 10-12-2011, 10:21 PM
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I agree and will do the same at my next (6000 mile) change. I've already checked, and my favorite oil change pan fits fine under the bike when it's on the the side stand. I probably won't wait till 6000 though - probably change around 4000.
I bought an extra quart of 10w50 from my dealer for $13.69 and haven't checked other sources yet. I was going to check and see if Wallyworld carries it. I do want to pick up some new washers though - I've had leakers before reusing them.

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post #34 of 40 (permalink) Old 10-12-2011, 11:16 PM
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I agree and will do the same at my next (6000 mile) change. I've already checked, and my favorite oil change pan fits fine under the bike when it's on the the side stand. I probably won't wait till 6000 though - probably change around 4000.
I bought an extra quart of 10w50 from my dealer for $13.69 and haven't checked other sources yet. I was going to check and see if Wallyworld carries it. I do want to pick up some new washers though - I've had leakers before reusing them.
Walmart carries the Mobil1 4T 10w40 for about $9-10 which is the same price as the Castrol Power 4T at Advance Auto...so obviously they watch each others price point. I'll change at 3-4,000 or once every fall before layup.
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post #35 of 40 (permalink) Old 10-13-2011, 12:28 AM
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Walmart carries the Mobil1 4T 10w40 for about $9-10 which is the same price as the Castrol Power 4T at Advance Auto...so obviously they watch each others price point. I'll change at 3-4,000 or once every fall before layup.
Thanks for the tip - plus Dazco says it'll make me go faster - need all the help I can get with my puny little 1600...

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post #36 of 40 (permalink) Old 10-18-2011, 07:32 PM
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I have not done an oil change myself on the Tbird, bike has been serviced by the bike shop for the first 2 years. The first 2 services they used Mobil 1 (900km after run in, & 12 month service). Just had the 2 year service & big bore kit installed at the same time. Just noticed on the receipt they have changed to Maxima oils, using Maxum Extra4 15/50. Not sure why, possibly just a shift in suppliers. Is anyone else running Maxima oils?
The old 1600 pistons & sleeves etc did look good though after 15000 kms on Mobil 1.
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post #37 of 40 (permalink) Old 10-18-2011, 11:05 PM
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FWIW: I change my oil and filter at 5000 mile intervals and have been using Mobil One,15/50,fully synthethic.WHY?? Because if ya look at the oil and feel it's viscosity with your fingers,you'll note that it's still in pretty good shape,not to mention that the motor runs quieter using 15/50.So anything less than a 5000 mile interval,IMO, is a waste of good oil and money.Plus,the 5000 mile interval is easier to remember.lol [tough to get old,lol] But!!! That's me. Dave!!!
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post #38 of 40 (permalink) Old 10-18-2011, 11:55 PM Thread Starter
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You know, think 'm going to switch to M1 10w40, and 'll tell you why. When i first put this M1 20w50 in the bike ran better. I could feel s definite and nice improvement in power apparently due to the better slickness of the M1 over the torco blend i had in it B4. But after a short time that extra oomph was gone and i believe i know why. theres a oil forum where the members are fanatical about motor oil and they seem to know all the latest details about various oils. I was hearing a lot about mobil having changed thier formula not long ago and i asked about it. I was told that in some oil comparisons, M1's new formula showed that thier oils viscosity actual went UP after a few miles, maybe a few hundred or some such thing. (don't recall exactly) So the 20w50 went up from 50 weight to 60 after the oil had some miles on it. This would make total sense from my experience. I figured the My full synth was slicker than the torco blend and also just a very good synthetic, so i figured that was the reason for the power increase. But when it went away soon all i could think was new oil is slicker and after a time it wasn't as slick. But if that was the reason the power diminished, why did i never notice a increase in power when i changed my oil in the past to the same oil used in the last change? then i read about M1 bike oil's new formula increasing in viscosity as it aged and it made perfect sense.

So while i can never be 100% sure, it does seem likely so i'm going to try 10W40 next time and hopefully it will run as well as the 20w50 did when new even after it has fully broken in.
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post #39 of 40 (permalink) Old 11-05-2011, 10:54 PM
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My new America had a Castrol sticker on the engine but the owners manual recomends Mobil-1. I use Mobil-1 4T 10w40 and Triumph (Filtech) filters. You should see marginal power / fuel mileage increase using lower viscosity oil (10w40 vs 20w50) on new or low mileage engines with close tolerances. Lower viscosity oil is much easier to pump with lower friction which is why new car manufacturers are specifing 5w20 or 0w20 engine oils to get the best possible MPG ratings. For a 10w40 the base oil is the low number (10w) with polimer chain additives to give it characteristics of a 40w oil when hot. The problem with viscosity improvers (polimers) is they can shear apart under high load which is why most inboard marine engine manufacturers still specify straight 30 or 40w oil only (I use 30w Chevron DELOin my boat engine.
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post #40 of 40 (permalink) Old 11-13-2011, 01:00 PM
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Where do you get the bad reports on Castrol? I've used it for years in everything with excellent results. I do use Mobil Racing 4T in the TBird and it has done a great job, but I see Triumph is now recommending Castrol instead. I can't imagine they would do that without serious testing and a good reason to do so.
Castrol has updated their formula since the most recent white paper oil test that amsoil put out. I read somewhere that Castrol used many bikes to develop their new oil formula (Power RS racing) including a triumph (not sure model). In the white paper castrol power rs r4 was tested (2009 test). At the dealer that I worked at I had a customer that wanted Castrol but could not get it for him due to the castrol formula switch over. I will note that when we disassebled his GSXR 1000 his clutch was is great shape with castrol oil as his choice oil.
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