Originally Posted By: G-MAN
Let's keep in mind that in the mid 80s it was CAFE that drove car makers in the US to adopt 5w30 when 10w30 and 10w40 were the "norm" here and 20w50 was considered "thin" in Australia. Now 5w30 is the "norm" even in Australia.
20W-50 was never considered "thin", it was just the standard viscosity. All the xW-60, 70, and 80s started in the late 80s, and I can't believe that it took off, but marketing will do that.
If you look at the shelves, 5W-30 isn't "norm" for DIY, regardless of what the workshop uses, but it's making inroads, and workmates don't look at me boggle eyed anymore when I suggest it.
Let's keep in mind that in the mid 80s it was CAFE that drove car makers in the US to adopt 5w30 when 10w30 and 10w40 were the "norm" here and 20w50 was considered "thin" in Australia. Now 5w30 is the "norm" even in Australia.
20W-50 was never considered "thin", it was just the standard viscosity. All the xW-60, 70, and 80s started in the late 80s, and I can't believe that it took off, but marketing will do that.
If you look at the shelves, 5W-30 isn't "norm" for DIY, regardless of what the workshop uses, but it's making inroads, and workmates don't look at me boggle eyed anymore when I suggest it.