- Feb 18, 2011
- Hudson, NH
The Escalade in my sig doesn't like the Ultra. Slaps and ticks at startup too much for my liking. No noises at all with the tough guard. Both are close (Ultra at 99%+, TG at 99% @20um). But the Ultra has multiple synthetic layers and a screen so there must be a difference in flow that bothers my lq9. So i think the TSB should be adhered to. Better flow using an ACdelco or something with less efficiency.. Hyundai had a similar TSB a ways back. Toyota OEM fliters, honda filters, all very low efficiency, high flow. My opinion being on here for a while has changed. I no longer think having clean oil matters as much as optimal flow.