I see that the range for a valve adjustment for a 99 Civic Si is about 30-60k. That's a pretty big range.

I was wondering having variables like having a turbo possibly changes the value to be sooner?

I don't drive particularly hard, spirited yes, I'll hit boost, but I don't RIP it to 8000rpm or anything. I don't need any unwanted attention, Texas cops are douches, and tickets are expensive.

I currently have 65,015 miles on the car now, it last got a valve adjustment at sometime around 35-40k miles. Heck it might have even been around 45k, I'm not sure.

I've only put about 2000 miles on the car in the last 3 years. I will be driving it more often, I just got a new job so a little more driving. Well, a itty bitty more, my commute is like a whole 10 miles.

 

"I was wondering having variables like having a turbo possibly changes the value to be sooner?"

Variables? There's not a formula for these things. Especially if your car is no longer stock. If you think you need one, DO one.