I did a recent oil change with Penrite Vantage 10w-40 semi-synthetic, it's rated SN, A3/B4, VW 502 00 / 505 00. [Which oil thread] This got me looking at the Penrite Vantage oil more closely [Penrite Vantage Link] It probably deserves it's own thread on the oil itself (C&P below) My old stash has two 10W-40 oils, Valvoline DuraBlend (DB) and Penrite Vantage (PV). Both are: - Semi-synthetic 10W40 - API SN/CF and ACEA A3/B4 KV40 viscosity DB = 103.0 cSt PV = 94 cSt KV100 viscosity DB =15.1 cSt PV = 13.5 cSt Cold Cranking (CCS) at -25C DB = 6100 cP PV = 6899 cP Now J300 says a 40 grade oil has a KV100 of 12.5 to 16.3 cSt and 10W has a max cold cranking of 7000 cP at -25C. The DuraBlend seems to have more typical values, similar to other 10W40 semi-synthetic oils I can find (like Castrol Magnatec 10W40) So I find the Penrite Vantage interesting, it's KV100 viscosity is at the lower end and close to a 30 grade, yet the cold cranking is at the upper end and almost a 15W. It's like this Penrite Vantage oil is not far away from a 15W30 with a heavy add pack (TBN = 11.0 and Zinc = 1220 ppm) BTW the old M1 0W40 also had KV100 = 13.5 cSt (with TBN = 11.8, Zinc = 1100 ppm and HTHS = 3.8 cP) I also spoke to Penrite today, and they confirmed that the Vantage is a Group II and Group III only blend (it contains no Group I - as is sometimes used by others), and that all Penrite semi-synthetics have a minimum of 20% Group III and possibly more depending on the actual product.