Hello everyone. I have a question and Engine Vacuum and how it correlates with engine condition. Can the amount of vacuum in a specific engine tell you what condition the engine is in? The reason I ask is I have a '02 WRX (100% stock, its a daily driver) with 114k miles on the clock. On deceleration it has just under 1 bar (I think 1 bar is around 14.5 lb's) on the factory installed boost guage. What does that tell me if anything about the engine condition? Since I had 2500 miles on the car I have had Amsoil ATM 10w30 with a SDF-20 filter and changed around 7500 miles per oil change. I have done many analysis with all coming back with very low wear numbers. I am curious if the money I have spent on the oil in addition to my non aggressive driving habits have helped in having a strong motor at 114k miles. What do you think?