quote:Actually the specs are 9.3 to 12.5 for 30wt and 12.5 to 16.3 for 40wt. 20wt is 5.6 to 9.3, 50wt is 16.3 to 21.9
Originally posted by JonS: It is the Cst at 100c. It should be 9.0-12.5 for 30w and 12.5-14.5 for 40w. This is the vs at that temp only. Any chnage in temp up or down will change the viscosity.
quote:Mobil 1 0w30 is around 10cst, so it's probably one of the thinnest 0w30s out there. Their 5w30 also was 10cst, but some of the most recent analysis results have suggested they might have thickened it up closer to 11cst now. Castrol Syntec 5w30 is 9.7cst at 100c. [ January 05, 2004, 03:23 PM: Message edited by: Patman ]
Originally posted by crimsontide: anyone know right off what 0w30 or 5w30 is closest to a 20 wgt??
quote:Mobil 1 0w30 isn't exactly highly regarded on here, not necessarily because it isn't good, but I think just simply because there are better 0w30s available, such as German Castrol Syntec 0w30 or Amsoil 0w30. If I owned a car that called for 5w20, and I was forced to choose either Mobil 1 0w20 or Mobil 1 0w30, I'd probably go with their 0w20, it looks to have a better additive package, and their 0w30 will most likely thin out to a 20wt anyways, while their 0w20 should hold it's viscosity well.
Originally posted by crimsontide: thanks for the info....i have the ford 5.4L and dont really wanna use a 0w20 or 5w20....would the mobil 1 0w30 be my best choice?
quote:I don't have the answer but wanted to say that my wifes Honda CRV also calls for the 5w20. I've got the Mobil-1 0w30 in it now but I may settle in with the Mobil-1 5w30 after my next oil change.... [ January 05, 2004, 04:31 PM: Message edited by: Hankrr ]
Originally posted by crimsontide: what oil would you recommend overall to take the place of a 5w20 oil in the 5.4L?
quote:I'm not sure about Motul, but the virgin sample of GC 0w30 I sent in came back with a viscosity of 12.2cst at 100c.
Originally posted by crimsontide: castrol (gc) 0w30, motul 0w30....what are the Cst on these oils, there sites dont tell you crap...
quote:That's because the Syntec 0w30 is made in Germany and the 5w30 is made in USA and they are totally different oils, not similar by any stretch of the imagination. The 0w30 is a true synthetic while the 5w30 uses a group 3 base oil. As far as finding out the specs on Motul 0w30, someone on here tried emailing them to get those specs but was only sent the data for their 0w40 and 5w40. Hopefully someone else on here might know the specs on their 0w30?
Originally posted by crimsontide: gc 0w30 is on the heavy side of a 30 wgt while the 5w30 is on the light side.....hummm...