Caporegime
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2012 MG runs on Tescos fuels...... That's gotta be against the race rules.
DELETED_5350
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2012 MG runs on Tescos fuels...... That's gotta be against the race rules.
At normal operating conditions, at startup they do make contact depending on the film strength of the oil, friction modifiers etc, you are just being deliberately obtuse to make a point.
At normal operating conditions, at startup they do make contact depending on the film strength of the oil, friction modifiers etc, you are just being deliberately obtuse to make a point.
Im not being obtuse, you are making statements that are incorrect.
At normal conditions they still make contact.
Soldato
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At normal operating conditions, at startup they do make contact depending on the film strength of the oil, friction modifiers etc, you are just being deliberately obtuse to make a point.
So if I started my car from cold.... I know I only do it 500 times a year. It would make sense to get the better oil....
Soldato
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Whats that got to do with a road car?
Yeah coz starting is it's normal operating condition, like I say deliberately obtuse.
Well a highly stressed racing engine operating at higher temperatures puts greater stress on a lubricant than a normal road pootling about most of the time, so one would imagine if they can handle that they can handle a road car without too much of a problem.
Soldato
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But what about the stresses on an engine from cold starts? Not a metric you can easily come to an objective conclusion on engine components wear over the course of a race season but something every relevant to consumer use.
Oil when up to temp and hence pressure is not really the concern. A good race car will be managing bulk oil temps anyway.
You missed my post earlier. Do they actually use that brand oil. Even if they did, do you think they really use the same stuff off the shelf? Naive much?
I think oil manufacturers have had this issue under control for many years, so make your own choice if spending lots on oil makes you more comfortable with the regularity of your starting.
Oil will always be present in your bearings even if the car has been standing untouched for a long time, so although this is the time of maximum wear, as it is the only time there should be any metal metal contact, it is momentary, you will reach sufficient oil pressure and crank velocity to achieve "floatation" just while cranking the starter, if it worries you that much, fit a pre-oiler, which is way more beneficial than more expensive oil.
Soldato
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wrong thread!
Soldato
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Its not as simple as that though is it. Viscosity at cold will limit ultimate bearing support.
I dont have too many concerns about cold starts and expensive oil. I have a pretty powerful starter motor but its repeated start stops and effects on things like crank thrust bearings that I would want additives to be 'hanging around' with minimal degredation over its life.
I dont have too many concerns about cold starts and expensive oil. I have a pretty powerful starter motor but its repeated start stops and effects on things like crank thrust bearings that I would want additives to be 'hanging around' with minimal degredation over its life.
If there was a problem with any oil from a cold start doing massive wear, you would know about it by now from watchdog and other sources. you are trying to make a mountain (massive wear) out of a molehill (momentary contact with less lubrication).
These cheaper oils you mention already have achieved and exceeded the ratings required by car manufacturers, the only reason they recommend specific brands in some handbooks is the subsidies they get on the oil they use for initial filling and testing.
We are just going round in circles here, you are trying to make out these oils aren't good enough, and they really are, so no further point arguing the point. Don't use it if you don't like it, but don't try and scaremonger other users into thinking mixing these oils of the same rating is going to somehow cause them huge problems with their engines and excessive wear at startup.
Really? So is oil more viscous or less viscous when cold?
Yes they do use the stuff, not in F1 where they have specially formulated oils, but in normal motor-racing they will use the right grade of an off the shelf oil. I saw it earlier and decided to ignore an obvious bit of baiting, but you seem to want to keep bringing it up.
You are naive if you think they use special oils that nobody else can buy, if they were that good, why would they not sell them?
Someone shoot me.
Im afraid this is wrong for the majority of race teams.
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Proof please, as the teams I have worked with always used the sponsors normal products.
Simon, I am aware you have worked blending oils for various companies, (at least I think it was you that claimed this in another oil thread) so rather than patronise and try to argue semantics, why don't you just tell us all of the problems you know of with these lessor oils.
Soldato
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More....
Unless its a 0W20 which is less viscous than a 10W40... which is why you need the right oil.