Mobil1 10w-60

[JonathanT]

Wandered into Halfords today to get some Mobil1 15w-50 as it's on offer to find that it's been replaced by 10w-60. Commments?

[Goodwin]

The subject of oils is a huge one and this is bound to provoke lively debate. The numbers refer to the viscosity alone and say nothing about the chemistry. for that you will need to look on the packaging for the ACEA specs (and others). Assuming the chemistry is fine then personally I beleive that this oil is a good choice. Why?
It will flow better at low temparatures than a 15W-50, meaning you get more flow sooner when the engine is cold, and therefore a (very) slight increase in protection when most of the wear occurs. You may see a few (1-5) psi drop in pressure compared to a previous oil at this point.
When hot the oil will be slightly thicker than 15W-50 making it slightly easier to maintain pressure (you may see a couple of psi more than previous).

Remember your oil pump provides flow. The pressure you measure is the resistance to flow, if the oil flows easier then lower pressure and vice versa.

[Simon says]

Worth reading about the ZDDP bit and here is a recent thread http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[BIGMIKE1]

I bought 2x 5litres tubs of mobil 1 15w50 last week in Halfords had loads on the shelf in Manchester! Think it was £38 each and took about 6.5litres when I changed it saturday.

[JonathanT]

the quoted spec is:
API SM/SL/SJ/CF
ACEA A3/B3 A3/B4
VW 501.01 / 505.00
MB-Approval 229.1

regarding ZDDP I think the relevant bit is:
phosphorous 0.13%

which I think is sufficient (1300ppm ZDDP)?

[SILICONEKID340HP]

Im only useing Valvoline VR1 mineral racing oil 20w50 .Should i move to fully synthetic..10 or 15w50..The cars runs fine with high oil pressure but premature wear is a worry..The VR1 oil is very high in zink and sludge build up is not a problem because i gets changed every three to four thousand miles..been told you can loose compresson when useing to thick oil something to do with hydrolics what ever that means .Now the engine as done around 6K should i move to Valvoline Vr1 10w60 semi synthetic..

http://www.eurocarparts.com/ecp/c/Audi_A3_2.0_2004...

•High zinc/phosphorus provides extreme wear protection, including flat tappet applications
•Additional friction modfiers to help deliver maximum horsepower
•Enhanced anti-foam system protects engine during extreme stress
•Compatible with gasoline or alcohol fuels
•Available through leading auto parts retailers
Approvals/Performance Levels
Viscosity Grade/Other
API SN/SM/SL
- - - - - - 20W-50
API SH *
10W-30 20W-50
API CD/CF *
10W-30 20W-50
Test
10W-30
20W-50
Vis @ 100°C (cSt)
11.5
20.5
Vis @ 40°C (cSt)
77.0
181.8
Viscosity Index
143
132
Spec Gravity @ 60°F
0.8722
0.888
Density (lbs/gal)
7.27
7.39
Total Base No.
8.5
8.5
Flash COC (°C)
212
248
Pour Point (°C)
-33
-24
CCS cP (°C)
6200(-25C)
8000(-15C)
MRV TP-1 cP (°C)
20,000(-30C)
27,000(-20C)
Noack % off @ 250C
<15
<15
Sulfated Ash
1
1
Zinc/Phosphorus
0.14/0.13
0.14/0.13
Calcium
0.210
0.210
Sodium
0.049
0.049

Edited by SILICONEKID340HP on Monday 20th June 19:46

[BillC99]

I'm using Selenia Racing 10W 60 Semi Synthetic in mine with no problems ( Available from Alfa dealers)

[TypeR1]

Im using valvoline, excellent stuff, and reasonably priced

[SILICONEKID340HP]

TypeR1 said:

Im using valvoline, excellent stuff, and reasonably priced

Which grade Valvoline are you useing ..Mineral.. semi.

[TypeR1]

Part Synthetic i.e. semi

[SILICONEKID340HP]

TypeR1 said:

Part Synthetic i.e. semi

What viscosity