If you go to storm bowling.com and go to the "In the Bag" section, they mentioned that Kent used the IQ Tour because the fronts hooked a little early. Its not a ball id use on true heavy oil, it doesn't change direction hard enough and its not strong enough.

The only way the Tour is going to be viable on truly heavy is if you're going to play dead straight up the lane (no belly), and there is a ton of friction down the lane. In a case like that, I could possibly see it because the mild break point of the IQ Tour could possibly keep the ball from going sideways down the lane. Still, I doubt there will be many cases where that is a bowler's best option. That being said, I would look into Storm/Roto's numerous other true heavy condition balls to fill that slot.

To give you some perspective, the IQ Tour solid is the 4th-strongest ball I carry. It is behind my Sync, Zero Gravity, and Lucid (2000-grit matte). For me, the Tour is the "benchmark" ball in my arsenal. It rolls smoothly and evenly to help me figure out what the lanes are doing.

Due to its small RG differential AND the fact that most people these days are speed dominant, the IQ Tour Solid is often not the best choice for true heavy oil.

If, however, you are a rev dominant player (at 16.5 mph and 300 rpms, you are close to being rev/speed matched) OR if you wish to play very direct, then this ball could be an alternative for true heavy oil.

A ball with a high RG differential and/or a strong coverstock and/or an asymmetric core is usually a better choice for bowling on true heavy oil.