Originally Posted By: userfriendly
Everyone is allowed an opinion, and I believe if the label says CJ-4, it will work in any engine that specifies A3/before.
I would tend to agree with that for the most part. However, there are many who are still under warranty and want something with actual builder approvals, not the least of whom are dealers and independent shops. Further, the days of getting a 5w-40 HDEO cheaper than an approved lube in both the States and Canada (particularly if one does chase a Canadian Tire or Walmart sale, which I don't) are mostly over. The best sales on Castrol 0w-40 and M1 0w-40 are getting very close to what I pay for Delvac 1, but I get the same price on Delvac 1 all the time, but I'm veering off, here. When M1 0w-40 and GC 0w-30 were the only choices and were only available in one litre bottles, a synthetic HDEO by the jug or pail was an attractive alternative. Now that they've got sensible container sizes for approved lubes (4.4 L M1 0w-40 is annoying, though), the push to save a few bucks isn't as obvious.