Dry Starts?
Originally Posted by DeeDubya,Aug 13 2007, 07:37 AM
I drive the s2000 about once a week. Should I be worried about dry starts?
[QUOTE=DeeDubya,Aug 13 2007, 07:37 AM]I still have the break-in oil now but at the first oil change I would like to make the right choice. Any suggestions?
Originally Posted by RACER,Aug 14 2007, 04:14 PM
roughly 80% of all engine wear takes place at start up.
A 0w30 and 10w30 only share the same viscosity through a tube at 100C. The base oil viscosity and hence other properties of the oil will be very different.
Basically the 10w will be a thicker base oil with less VM, offering more protection under load as they typically have higher HTHS values.
I would be happy running a 10w in any conditions above zero degrees, it would also offer more protection when driven hard and less suseptible for the VM to shear meaning you lose the thickening effect as the oil gets older.
As for the OP, just start the car when you need to drive it
Basically the 10w will be a thicker base oil with less VM, offering more protection under load as they typically have higher HTHS values.
I would be happy running a 10w in any conditions above zero degrees, it would also offer more protection when driven hard and less suseptible for the VM to shear meaning you lose the thickening effect as the oil gets older.
As for the OP, just start the car when you need to drive it
Originally Posted by Si2k,Aug 15 2007, 02:08 AM
Basically the 10w will offer more protection under load
I would be happy running a 10w in any conditions above zero degrees, it would also offer more protection when driven hard
I would be happy running a 10w in any conditions above zero degrees, it would also offer more protection when driven hard
[QUOTE=Si2k,Aug 15 2007, 02:08 AM]As for the OP, just start the car when you need to drive it
A lot of good advice.
Thanks to everyone for your input. I've owned a number of vehicles over the years but there's something special about this little s2000 that makes me think I'll be keeping it for a while.
Thanks to everyone for your input. I've owned a number of vehicles over the years but there's something special about this little s2000 that makes me think I'll be keeping it for a while.
Okay..... 
Si2k Posted on Aug 15 2007, 11:08 AM
True, in general.
The SAE 30 range is wide though, anything between 9.3 cSt and 12.5 cSt is called a 30 weight.
Take the "German" Castrol 0W-30 at 12.2 cSt @100C.
My Shell 0W-30 is 9.6 cSt @100C.
Most 10W-30's oil specs I have seen are between 10.4 and 11.2 cSt @ 100C.
Not the same.
Also true.
Some Group IV/V 0W-30 oils will have better properties then most dino 10W-30's.
Note: in favour of the "thinner" oil.
Check your facts.
I did some quick "research" on HTHS numbers:
Mobil1-EP 10W-30: 3.1
Mobil1 10W-30: 3.14
Mobil1-EP 5W-30: 3.1
Mobil1 0W-30: 2.99
Amsoil 10W-30: 3.2
Amsoil 0W-30: 3.2
Not a lot of difference.
Besides, higher HTHS numbers usually means thicker oils, usually xxW-40 oils.
I've seen a study done, posted on BITOG, that the thinner the oil the more (yes, MORE) oil is left at the top of the cylinder wall, helping the rings seal better, less wear, less friction due to "thick" oil = less power loss at higher revs.
The F20C2 (and the F22) make some revs too
How much HTHS do you really need?
ACEA (European ILSAC) states that long drain interval oils in the highest catagory still should have a HTHS of 2.9, max HTHS value is 3.5.
So you're driving your Volkswagen diesel around for 30.000 km on one sump of oil and a HTHS of 3 is bad....?
I don't think so
Why did I pick a diesel?
Known for high torque at low revs, that is IMO the times when one needs the HTHS most.
Our F20C2's spinin' at 8700 rpm generate so much hydrodynamic oil pressure in the cranck journals, who needs HTHS
Again: a true syn 0W-30 made of synthetic base stocks will perform better at higher temps for a longer time.
A true 10W-30 will also do that, but you loose the flow needed at lower engine temps.
So a true syn 10W-30 has no real benefits IMO.
Agreed, let the high idle settle for +/- 10 seconds and drive.

Si2k Posted on Aug 15 2007, 11:08 AM
A 0w30 and 10w30 only share the same viscosity through a tube at 100C.
The SAE 30 range is wide though, anything between 9.3 cSt and 12.5 cSt is called a 30 weight.
Take the "German" Castrol 0W-30 at 12.2 cSt @100C.
My Shell 0W-30 is 9.6 cSt @100C.
Most 10W-30's oil specs I have seen are between 10.4 and 11.2 cSt @ 100C.
Not the same.
The base oil viscosity and hence other properties of the oil will be very different.
Some Group IV/V 0W-30 oils will have better properties then most dino 10W-30's.
Note: in favour of the "thinner" oil.
Basically the 10w will be a thicker base oil with less VM, offering more protection under load as they typically have higher HTHS values.
I did some quick "research" on HTHS numbers:
Mobil1-EP 10W-30: 3.1
Mobil1 10W-30: 3.14
Mobil1-EP 5W-30: 3.1
Mobil1 0W-30: 2.99
Amsoil 10W-30: 3.2
Amsoil 0W-30: 3.2
Not a lot of difference.
Besides, higher HTHS numbers usually means thicker oils, usually xxW-40 oils.
I've seen a study done, posted on BITOG, that the thinner the oil the more (yes, MORE) oil is left at the top of the cylinder wall, helping the rings seal better, less wear, less friction due to "thick" oil = less power loss at higher revs.
The F20C2 (and the F22) make some revs too

How much HTHS do you really need?
ACEA (European ILSAC) states that long drain interval oils in the highest catagory still should have a HTHS of 2.9, max HTHS value is 3.5.
So you're driving your Volkswagen diesel around for 30.000 km on one sump of oil and a HTHS of 3 is bad....?
I don't think so

Why did I pick a diesel?
Known for high torque at low revs, that is IMO the times when one needs the HTHS most.
Our F20C2's spinin' at 8700 rpm generate so much hydrodynamic oil pressure in the cranck journals, who needs HTHS
I would be happy running a 10w in any conditions above zero degrees, it would also offer more protection when driven hard and less suseptible for the VM to shear meaning you lose the thickening effect as the oil gets older.
A true 10W-30 will also do that, but you loose the flow needed at lower engine temps.
So a true syn 10W-30 has no real benefits IMO.
As for the OP, just start the car when you need to drive it



