boys bikes under $100 image
Q. My owners manual recommends SAE 10W30 type SH for my Yamaha 125cc, I would like to find out if I can use say 10W40 or 5W40 or 15W50 ect in my bike?
And also what does the type SH stand for?
Thanks for your help
And also what does the type SH stand for?
Thanks for your help
Answer
Ok boys and girls....first off, oil thins out (looses viscosity) as it get hotter. More on that later. There are straight weight oils, 10, 20, 30, 40, 50 and multi viscosity oils, 10W30 15W50, etc. A straight weight oil is going to be stiff and thich when cold and thinner when hot. A 50 weight oil is going to have a higher viscosity (be thicker) when cold than will a 10 weight, regardless of the oil temperature.
In the good old days when there was nothing but straight weight oils, in zero temps a 50 weight was so stiff the starter couldn't turn the engine over but in 100 degree heat, a 10 weight was thin as water and wouldn't not properly lubricate bearings.
Along came multi-vicsosity oils. A 10W40 was as thin as a 10 weight when cold but as thick as a 40 weight when hot. I think this is where the fellow came up with the idea that oil thickens as it gets hot...well not exactly but close. Multi weight maintain their viscosity as temps increase.
The SH is a gasoline oil rating while diesel oils have a rating starting with C. If you look on the back of the oil jug, you'll see some oils are S only while others have both a S and a C rating and are adequate for either type of engine. The latest oils (SJ I think, too many to remember) are different from earlier ratings since the latest oils have very little zinc in the formulation, which isn't good for old engines with flat tappets as opposed to roller tappets. The zinc provides a strong barrier under high shrear loads...like tappets sliding across the cam lobe.
Normally the only oils you can find are the ones with the latest rating or something like a SA, the really cheap crap you find at discount stores for a buck a quart. DON'T use that stuff except maybe for your lawnmower.
A long time ago (for you guys, 1985) when Chrysler came out with their turbo engines, those engines had a higher oil rating requirement than the non-turboed jobs (SG for turboed vs SF for others I think??). This was necessary because the oil had a very hostile environment to work in when lubricating the super hot, ultra high speed turbo bearings.
You may have a hard time finding a SH oil anymore. I've switched to diesel oils since most of them still have the higher zinc levels (except for the very latest rating, can't remember it's number off hand). I'm using the conventional-synthetic mixes and like them. If you can find a farm store nearby, you shouldn't have any problem at finding an assortment of diesel oils, especially the preferred older rated oils.
Ok boys and girls....first off, oil thins out (looses viscosity) as it get hotter. More on that later. There are straight weight oils, 10, 20, 30, 40, 50 and multi viscosity oils, 10W30 15W50, etc. A straight weight oil is going to be stiff and thich when cold and thinner when hot. A 50 weight oil is going to have a higher viscosity (be thicker) when cold than will a 10 weight, regardless of the oil temperature.
In the good old days when there was nothing but straight weight oils, in zero temps a 50 weight was so stiff the starter couldn't turn the engine over but in 100 degree heat, a 10 weight was thin as water and wouldn't not properly lubricate bearings.
Along came multi-vicsosity oils. A 10W40 was as thin as a 10 weight when cold but as thick as a 40 weight when hot. I think this is where the fellow came up with the idea that oil thickens as it gets hot...well not exactly but close. Multi weight maintain their viscosity as temps increase.
The SH is a gasoline oil rating while diesel oils have a rating starting with C. If you look on the back of the oil jug, you'll see some oils are S only while others have both a S and a C rating and are adequate for either type of engine. The latest oils (SJ I think, too many to remember) are different from earlier ratings since the latest oils have very little zinc in the formulation, which isn't good for old engines with flat tappets as opposed to roller tappets. The zinc provides a strong barrier under high shrear loads...like tappets sliding across the cam lobe.
Normally the only oils you can find are the ones with the latest rating or something like a SA, the really cheap crap you find at discount stores for a buck a quart. DON'T use that stuff except maybe for your lawnmower.
A long time ago (for you guys, 1985) when Chrysler came out with their turbo engines, those engines had a higher oil rating requirement than the non-turboed jobs (SG for turboed vs SF for others I think??). This was necessary because the oil had a very hostile environment to work in when lubricating the super hot, ultra high speed turbo bearings.
You may have a hard time finding a SH oil anymore. I've switched to diesel oils since most of them still have the higher zinc levels (except for the very latest rating, can't remember it's number off hand). I'm using the conventional-synthetic mixes and like them. If you can find a farm store nearby, you shouldn't have any problem at finding an assortment of diesel oils, especially the preferred older rated oils.
What is a good starter dirt bike for a 16 year old boy?
Sing
I'm 16 and weigh around 170 pounds. I'm 5'9" and am looking for something that i can find used under $1500. Prob something not super powered like a 4-stroke, 125 cc. Something that's good to learn on but still fun to drive
Answer
lots of older 125cc bikes around in reasonable condition...
Honda have a range of 100/125/175cc 4 strokes..
Yamaha have 2 & 4 strokes.. SR185 Yamaha .. ideal if you can find one..
http://www.google.com.au/imgres?q=SR185+Yamaha&num=10&hl=en&safe=off&biw=1920&bih=899&tbm=isch&tbnid=Cw6HWmcvslVYLM:&imgrefurl=http://www.motorcyclespecs.co.za/model/yamaha/yamaha_sr185.htm&imgurl=http://www.motorcyclespecs.co.za/Gallery%252520%252520A/Yamaha%252520SR185%25252082.jpg&w=414&h=242&ei=xYs9UNywHqi5iQeamYDgAg&zoom=1
lots of older 125cc bikes around in reasonable condition...
Honda have a range of 100/125/175cc 4 strokes..
Yamaha have 2 & 4 strokes.. SR185 Yamaha .. ideal if you can find one..
http://www.google.com.au/imgres?q=SR185+Yamaha&num=10&hl=en&safe=off&biw=1920&bih=899&tbm=isch&tbnid=Cw6HWmcvslVYLM:&imgrefurl=http://www.motorcyclespecs.co.za/model/yamaha/yamaha_sr185.htm&imgurl=http://www.motorcyclespecs.co.za/Gallery%252520%252520A/Yamaha%252520SR185%25252082.jpg&w=414&h=242&ei=xYs9UNywHqi5iQeamYDgAg&zoom=1
Powered by Yahoo! Answers
Title Post: What is the difference between these types of oils?
Rating: 94% based on 932 ratings. 4,1 user reviews.
Author: Unknown
Thanks For Coming To My Blog
Rating: 94% based on 932 ratings. 4,1 user reviews.
Author: Unknown
Thanks For Coming To My Blog
No comments:
Post a Comment