I was just at Walmart to check out their price on diesel oil and found this oil. Tech 2000--Semi-synthetic `15/40 diesel. It is rated at CH-4, CG-4, CF-4, CF/SH, SJ with a flow rate of -30F. It is only $12/4 litres Cdn.($9 US). They told me the regular 2000 was made with recycled oil but did not know about the semi-synthetic. Is this stuff any good to run in a Cat diesel or is it another case of you get what you pay for? Roger