I have the tech data sheets on all the oils you asked about except the Motorcraft. You can get them from their web sites (exception: Castrol, they emailed them to me, don't know why they are not available on their site).
But out of the ones you asked about Havoline/Chevron 10W30 was the thickest: cSt @ 40C 73.5, cSt @ 100C 10.8
Win, do you use Mystik? I always wondered if Mystik really was a special oil. My Dad (who was a good mechanic (and two professional mechanics told me that Mystik is really good. I am considering sending in a VOA on Mystik to see if it is really so good. Personally myself, even though some people have told me that Mystik is a special motor oil, I have used it only a few times.
quote:Originally posted by Mystic:
Win, do you use Mystik?
I use it in one of my Jags, with good results. I will use more of it in the future but for now our area Wal-Marts have been closing out lots of oils at giveaway prices.
I have 30+ gallons of oil to go through ...
quote:Originally posted by sbc350gearhead:
I have never heard of mystik. Where do you find it at?
Around here, the Mystik motor oils are only sold in Farm and Ranch stores. I've seen the 15/50 and 30 in some AutoZones in Oklahoma.
Most of the local parts houses carry Mystik greases.
The MSDS are on the Citgo website.