Mobile 1 vs. Others
07-05-2004, 01:57 PM
#19
Addicted Specialist
Rennlist Member
Rennlist Member
Sorry for the long response, but here goes:
Regarding the Porsche recommendation of 0 or 5 weight for all cars, I'm a bit more than skeptical of this. My suspicion is that the factory is "streamlining" their recommendation to encompass a host of cars over a broad range of model years simply because it's easier for them to recommend one viscosity fits all. Why would a manufacturer do this? I'm thinking for their ease (does Porsche really want to test each oil in each viscosity for cars they don't even produce any longer???), and it potentially limits their liability should some (newer) engines grenade. Imagine their response to queries/complaints: "Well, did you use the factory recommended fill of..." Clearly, the oil/viscosity Porsche recommends isn't "bad" for 993s, but is it necessarily the best choice for hotter climates? Again, my suspicion is that the corporate bean counters had more to say about this than the engineers. Given the higher temps and higher stress that our aircooled engines must endure (as opposed to the more narrow operating temp of the wasser-boxer engines), I'd continue to use 15w-50 in any climate that gets hot...and it's a no-brainer for those tracking their cars. More than just an opinion of this backyard wrench of 20+ years but also the consensus of real tuners both on this board and those I've encountered personally over the years. The rule to choosing a viscosity is based on one's intended use and environment. Sure you "could" use the same weight for summers in LasVegas and winter in Maine, but would that be the "best" choice? Again, these are just my thoughts based on my gleaning info over the years from pros, amatures, and my own experience...FWIW. Thanks for listening and feel free to ignore me
Edward
Regarding the Porsche recommendation of 0 or 5 weight for all cars, I'm a bit more than skeptical of this. My suspicion is that the factory is "streamlining" their recommendation to encompass a host of cars over a broad range of model years simply because it's easier for them to recommend one viscosity fits all. Why would a manufacturer do this? I'm thinking for their ease (does Porsche really want to test each oil in each viscosity for cars they don't even produce any longer???), and it potentially limits their liability should some (newer) engines grenade. Imagine their response to queries/complaints: "Well, did you use the factory recommended fill of..." Clearly, the oil/viscosity Porsche recommends isn't "bad" for 993s, but is it necessarily the best choice for hotter climates? Again, my suspicion is that the corporate bean counters had more to say about this than the engineers. Given the higher temps and higher stress that our aircooled engines must endure (as opposed to the more narrow operating temp of the wasser-boxer engines), I'd continue to use 15w-50 in any climate that gets hot...and it's a no-brainer for those tracking their cars. More than just an opinion of this backyard wrench of 20+ years but also the consensus of real tuners both on this board and those I've encountered personally over the years. The rule to choosing a viscosity is based on one's intended use and environment. Sure you "could" use the same weight for summers in LasVegas and winter in Maine, but would that be the "best" choice? Again, these are just my thoughts based on my gleaning info over the years from pros, amatures, and my own experience...FWIW. Thanks for listening and feel free to ignore me
Edward
07-05-2004, 08:30 PM
#20
Rennlist Member
Thread Starter
Originally posted by Mark in Baltimore
Arrwin,
Is the Quaker State a full synthetic or a blend? I use Mobil 1 in my 993 but also trust and have been very happy with Castrol Syntec and Valvoline full synthetic for my other, non-Porsche vehicles. If you're not driving the car hard or tracking it, in your cold climate I might consider a 5W-50.
Arrwin,
Is the Quaker State a full synthetic or a blend? I use Mobil 1 in my 993 but also trust and have been very happy with Castrol Syntec and Valvoline full synthetic for my other, non-Porsche vehicles. If you're not driving the car hard or tracking it, in your cold climate I might consider a 5W-50.
Originally posted by icerbofh
Arrwin, I would second the comment about making sure that they changed both filters.
Arrwin, I would second the comment about making sure that they changed both filters.
