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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Viscosity
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<blockquote data-quote="clevtrev" data-source="post: 85554" data-attributes="member: 187"><p>Basically the long chain polymers that make up the high viscosity factors break down ( chopped up) because the oil never gets to its operating temperature. Oil designed for engines is wanting the oil temperature to reach a certain temperature for it to become a lubricant that puts a film between the surfaces. That temperature is in the region of 170 F. Until it gets to that temperature damage is being done. When did your oil get past 50 F ?</p><p>Years ago when I did a temperature check on all bikes turning up at a Liphook meet, I had a page full of figures quoting Oil used, distance traveled to meet, bike capacity twin/single.air temperature. Next day spoke with Filtrate told them what I had found, and asked for a recommendation of oil to be used, the answer `Straight 10. </p><p>If anyone asks me what I use, it`s 10-30 diesel.</p><p>My experience of riding in high temps, (1oo F) I found I could still dip my finger in the tank without burning. Try that in your car after ten miles.</p></blockquote><p></p>
[QUOTE="clevtrev, post: 85554, member: 187"] Basically the long chain polymers that make up the high viscosity factors break down ( chopped up) because the oil never gets to its operating temperature. Oil designed for engines is wanting the oil temperature to reach a certain temperature for it to become a lubricant that puts a film between the surfaces. That temperature is in the region of 170 F. Until it gets to that temperature damage is being done. When did your oil get past 50 F ? Years ago when I did a temperature check on all bikes turning up at a Liphook meet, I had a page full of figures quoting Oil used, distance traveled to meet, bike capacity twin/single.air temperature. Next day spoke with Filtrate told them what I had found, and asked for a recommendation of oil to be used, the answer `Straight 10. If anyone asks me what I use, it`s 10-30 diesel. My experience of riding in high temps, (1oo F) I found I could still dip my finger in the tank without burning. Try that in your car after ten miles. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Viscosity
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