Yah, I'd say stick with FDR for the stability.
As above, Standard oil isn't that great. FDR's infrastructure build speed may help you eventually once you run out of building slots and/or want to increase your resource production. The stability is also pretty solid, especially since you will eventually lose a fair chunk for being at war and giving refuge to scientists. Also afaik tends to have Congress have less movement, which is usually good since you likely have built up a solid amount of support.