I'm getting ready to replace the A/C compressor on my G60. I'm planning on replacing all the exisitng A/C hoses with barrier hose when I do my 16v G60 swap down the road. So after flushing all the A/C components now, I plan on filling with PAG oil in preparation for R134a. Currently using envirosafe R12 repalcement for now (currently running it in my VR6 and it works GREAT) in the car again till I do full conversion. I'm just not sure what type of PAG oil to use? 46, 100, 150? Appreciate any input, thanks!