The evidence is pretty consistent with warming since around 1800. There is evidence, although less free from discussion as to value and validity when compared to the historical evidence, that the rate of warming is increasing. However, we are still within this period of general warming. Denial of the easily demonstrated evidence for that change is a waste of time. The argument can only be about the reasons for the change, not about whether there is change.
I do not think that all oil companies can be painted truthfully as deniers of change. They tend to be deniers of the importance of CO2 in causing or sustaining that change. Even if you accept that man does cause some or all of the warming, that still leaves discussion of the net impact of such change (its good versus bad aspects) and even if there is something that we humans can do to change anything.
The simplistic argument of true or false is not applicable. This is not a black or white, on or off argument.