I have 2 cases of it in the garage and was thinking of using it when i change the oil in the titan. Is it too light or should it be alright?
titanmike
anyone run 5w20?
I'm not sure where St Pete is, but sounds like FL or therabouts. I use 0W40 based upon test by JetTech and I'm in mid Atlantic. I wouldn't run 5W20 if in hot climate. Next oil change in Late Dec/Jan might be OK. Mfg are going lighter and lighter, but if 5W20 isn't on the chart for our engine, I wouldn't go that light.titanmike said:
My understanding is the first # is initial weight and the 2nd # is running temperature. So you would be OK at startup, but not as heavy as recommended for running,
Yeah, sell the bike and do the Mods, but I'm a klutz that needs 4 wheels.
I guess i'll just get some oil for it tomorrow. and about the bike i was so close to putting an add for it today but i haven't yet. I don't know if i want to do it for sure yet. I can't make up my mind.
I'd keep the bike. When I was paying $3.30 a gallon for gas a while back, I started to look into a used bike to cut down on my fuel costs. On the other hand, if you don't enjoy riding the bike anymore, then it makes sense to sell it.
I still enjoy riding it. But its either bike or cai/exhaust/lift. Such a tuff thing to decide.
I'd stick to at least the 5/30w. 0/40w is ok also but I don't think I'd go down to a 20w....especially in a warm climate.
Not to nitpick (again. 
), but the "w" is "winter" not "weight", so 5/30w doesn't make sense.
5w-30 is a 5 "winter" viscosity for when the oil is cold and SAE 30 when hot. Naturally, oil thins when it is heated, so to say an oil flows like a 5 weight when cold and 30 when hot implies the oil is thinner when cold.
5w-30 will flow better than 10w-30 when cold but flow the same when hot. 0w-40 will flow better than a 5w-30 when cold but have a higher viscosity when hot. 0w-40 is only possible with synthetics and is an interesting oil from a chemical stanpoint. Generally speaking with conventional oils, the greater the spread between the two numbers, the higher the use of VIs or viscosity improvers, and the greater the risk of viscosity breakdown as the VIs "wear out" and the oil slowly goes from a multi-weight oil back to the initial viscosity of the base stock.
A bit off-topic, sorry.
As for the 5w20, I wouldn't risk it. It works the same as 5w-30 when cold, but ends up being a lot thinner when hot and could contribute to premature wear if the oil's shear strength is less and the oil pump is unable to keep oil pressure within spec throughout the engine due to being easier to pump. That being said, Ford went from 5w-30 to 5w-20 on their trucks without any mechanical changes that I'm aware of. Whether the same does or will hold true for the VK56DE I don't know.
I'd give the 5w-20 to someone with a Ford or Honda for Christmas.
:cheers:
), but the "w" is "winter" not "weight", so 5/30w doesn't make sense.5w-30 is a 5 "winter" viscosity for when the oil is cold and SAE 30 when hot. Naturally, oil thins when it is heated, so to say an oil flows like a 5 weight when cold and 30 when hot implies the oil is thinner when cold.
5w-30 will flow better than 10w-30 when cold but flow the same when hot. 0w-40 will flow better than a 5w-30 when cold but have a higher viscosity when hot. 0w-40 is only possible with synthetics and is an interesting oil from a chemical stanpoint. Generally speaking with conventional oils, the greater the spread between the two numbers, the higher the use of VIs or viscosity improvers, and the greater the risk of viscosity breakdown as the VIs "wear out" and the oil slowly goes from a multi-weight oil back to the initial viscosity of the base stock.
A bit off-topic, sorry.
As for the 5w20, I wouldn't risk it. It works the same as 5w-30 when cold, but ends up being a lot thinner when hot and could contribute to premature wear if the oil's shear strength is less and the oil pump is unable to keep oil pressure within spec throughout the engine due to being easier to pump. That being said, Ford went from 5w-30 to 5w-20 on their trucks without any mechanical changes that I'm aware of. Whether the same does or will hold true for the VK56DE I don't know.
I'd give the 5w-20 to someone with a Ford or Honda for Christmas.
:cheers:
I'm a bit confused by your examples. Please clarify or just say yes/no to the following. Thanks in advance.Yahooligan said:Not to nitpick (again.
5w-30 is a 5 "winter" viscosity for when the oil is cold and SAE 30 when hot. Naturally, oil thins when it is heated, so to say an oil flows like a 5 weight when cold and 30 when hot implies the oil is thinner when cold.
5w-30 will flow better than 10w-30 when cold but flow the same when hot. 0w-40 will flow better than a 5w-30 when cold but have a higher viscosity when hot.
:cheers:
Are you saying 5w30 and 10w30 both flow as 30 when hot?
That the 5w30 flows better (is thiner) than 10w30 when cold?
Therefore 5w is the weight or viscosity of cold oil and 30 (or 40) is the weight or viscosity of the oil when hot?
Therefore, Motor oils start at the thiner (5 or 10) weight when cold and thicken to the (30 or 40) weight when warm?
Or are you saying just the opposite?
Oil starts thick (30 or 40) and thins out to (5 or 10) when warmed up?
I appreciate pickiness.
YesTitanBlue said:
Yes
The short answer is yes. A "5w" rating means the oil will flow like a cold SAE-5 oil. SAE 5 oil is very thin when hot, so obviously a cold 5w oil won't flow like a hot SAE 5 oil and a cold SAE 5 oil will be a lot thinner than a cold SAE 30 oil. The cold and hot ratings are typically around 23F for cold and 212F for hot.
No. Oil thins when heated, so a 5w-30 oil flows like a 5w (Or cold SAE 5) when cold and like a hot SAE 30 oil when hot (212F). The cold SAE 5 oil will be thicker than a hot SAE 30, which is why your oil pressure is higher when the oil is cold. The higher oil pressure is due to the thicker oil.
Yes that it starts out thick, but the numbers are reversed. The confusion comes from thinking the viscosity of "5w" and "30" are both tested at the same temperatures. The cold rating is for a cold oil viscosity, the hot rating is for a hot oil viscosity.
haha, thanks! Oil is interesting...and confusing. I probably got a little confused myself since work was interrupting my thought and typing process for this post.I appreciate pickiness.
"Yes that it starts out thick, but the numbers are reversed. The confusion comes from thinking the viscosity of "5w" and "30" are both tested at the same temperatures. The cold rating is for a cold oil viscosity, the hot rating is for a hot oil viscosity." - QOUTE
Now it all makes sense. That paragraph clarified everything for me.
I'd been told by a mechanic years ago that the oil got thicker when it got warm (Never seen it happen myself of course), and that most people misunderstood about oil getting thinner when hot.
It just never made sense to me that way.
I guess he had a misunderstanding as you just explained. And I do recall hearing the term "winter" many years ago, just never seen it explained. Now it all makes sense.
You'll get lots of feedback on this post.
Now it all makes sense. That paragraph clarified everything for me.
I'd been told by a mechanic years ago that the oil got thicker when it got warm (Never seen it happen myself of course), and that most people misunderstood about oil getting thinner when hot.
It just never made sense to me that way.
I guess he had a misunderstanding as you just explained. And I do recall hearing the term "winter" many years ago, just never seen it explained. Now it all makes sense.
You'll get lots of feedback on this post.
This is why (if you've noticed during an oil change), the oil comes from the engine into the pan fairly thick (if the engine is warm) compared to the oil you pour in to replace it from teh bottlem which is comparatively thin.Yahooligan said:Yes
Yes
The short answer is yes. A "5w" rating means the oil will flow like a cold SAE-5 oil. SAE 5 oil is very thin when hot, so obviously a cold 5w oil won't flow like a hot SAE 5 oil and a cold SAE 5 oil will be a lot thinner than a cold SAE 30 oil. The cold and hot ratings are typically around 23F for cold and 212F for hot.
No. Oil thins when heated, so a 5w-30 oil flows like a 5w (Or cold SAE 5) when cold and like a hot SAE 30 oil when hot (212F). The cold SAE 5 oil will be thicker than a hot SAE 30, which is why your oil pressure is higher when the oil is cold. The higher oil pressure is due to the thicker oil.
Yes that it starts out thick, but the numbers are reversed. The confusion comes from thinking the viscosity of "5w" and "30" are both tested at the same temperatures. The cold rating is for a cold oil viscosity, the hot rating is for a hot oil viscosity.
haha, thanks! Oil is interesting...and confusing. I probably got a little confused myself since work was interrupting my thought and typing process for this post.
Pardon? You're a little backwards there.FuzzyLogic said:
If you let a cold/cool engine run for a few minutes before draining the oil it will drain easier because the oil will be thinner. The cool oil being poured from the bottle will be thicker than warm/hot oil being drained from the pan.
Fluid dynamics and chemistry, my man.
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