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Old 07-11-2009, 12:21 AM   #1
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I have heard with today's oil, an older sled with a specified 20:1 ratio will run with no troubles at 40:1. I use Amsoil Dominator...thoughts?
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Old 07-11-2009, 08:58 AM   #2
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Oils are enginered to run in the engines. Engines are designed to run WITH oil, no matter how they were enginered. What ever the ratio the oil was developed to run at then thats what you can mix it at. Back in the 60's our oils were just this side of crude. You'll be alright at even at 50:1.
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Old 07-11-2009, 02:21 PM   #3
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I run 32:1 and for me it makes it easy to calculate at 4 ounces per gallon. Motor doesn't smoke much and I still don't foul plugs. I'm happy with that ratio so I'm sticking to it. Everybody has their own preference. I still use castrol super snowmobile oil(non-synthetic) and I love the sweet smell. When I had my newer sled years ago, I switched to synthetic for a short time and the smoke burned my eyes. Forget that crap!
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Old 07-12-2009, 07:22 AM   #4
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Where in Western PA? I live in Waterford PA near Erie.
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Old 07-16-2009, 12:13 AM   #5
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I was in Waterford on Tuesday...took my kids to the Erie Zoo.
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Old 07-16-2009, 12:16 AM   #6
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32:1 sounds good to me. I am very pleased with how my Cheetah starts/runs! I think I made a good purchase.
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Old 07-16-2009, 06:54 AM   #7
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<div class='quotetop'>QUOTE (Cheetah73 @ Jul 11 2009, 01:21 PM) <{POST_SNAPBACK}></div>
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When I had my newer sled years ago, I switched to synthetic for a short time and the smoke burned my eyes.[/b]
Not all synthetics are the same. Some burn really clean and some are just terrible. I would guess the oil you used was one of the more stinky synthetics, possibly Amsoil, Ipone, etc., or even Cat synthetic oil. They are horrible oils to breathe if the rider in front of you is running them.

I currently use Shell Advance SnoUltra (full synthetic). No smoke, almost no smell, no exhaust port carbon deposits, burns incredibly clean but doesn't burn your eyes, breaks down easily in the environment, and meets the ISO-L-EGD/JASO FD latest standards for ultimate engine protection. According to the Royal CATalog I'm looking at right now, Castrol SS only meets TCW3, which is an antiquated oil spec from the 70's, and doesn't even come close to modern oils in terms of anti-wear properties, engines will wear out faster as compared to using a modern oil meeting latest standards. SnoUltra is cheap when it's on sale, competitive with non-synthetic pricing.

With over 10,000 miles of using it, I can still see the cross-hatches on the bores and compression is still as new too. Although I will admit compression doesn't reveal actual amount of ring wear. No carbon build-up in the exhaust port, ring grooves stay clear of carbon deposits too, synthetics can bring huge advantages over the non-synthetic oils that aren't visible to the eye until you take the motor apart for a closer look.

Try Shell's SnoUltra. It will burn even cleaner, stink even less than the Castrol SS, and many other popular synthetics... And not burn the eyes! I bet it can be run it at 50:1 and have a much lower engine wear rate with zero carbon deposits than compared to Castrol SS @ 32:1 or other non-synthetics.
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Old 07-16-2009, 02:53 PM   #8
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Do any of the major retailers sell the Shell product?
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Old 07-16-2009, 04:48 PM   #9
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<div class='quotetop'>QUOTE (LakeEffect @ Jul 16 2009, 01:53 PM) <{POST_SNAPBACK}></div>
 Quote:
Do any of the major retailers sell the Shell product?[/b]
On this side of the border I've seen it at Walmart and Canadian Tire. Also have seen it at Shell stations but it never is on sale there.

I don't know what to suggest south of the border, sorry. Hopefully other ArcticChatters will know.
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Old 07-16-2009, 06:23 PM   #10
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I'll look into other oil options. The synthetic I was using when it burned my eyes was some sort of bombardier product being used in my 96' formula III 600.
I'll look into finding a better oil. Castrol has changed a bit since they called it Super Snowmobile oil. I was just using up what I had left from 10 years ago. I have a new bottle and I'll read the back to see if any improvements have been made. I like the info you passed on about the shell sno-ultra. Thank you
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