Scotty - I lucked into a 2010 Scion xB with 74,000 original miles. I checked service history and never had any services except oil changes. I found no codes when I scanned. It feels like it struggles to maintain highway speed. Should I add anything to oil/transmission fluid changes to clean out any built up varnish?
I'd also throw in a new air filter and do a cleaning of the MAF and throttle.
https://www.youtube.com/watch?v=NWCKvU2FmDc
I took your advice and followed Scotty's video. I cleaned the MAF sensor and throttle body. Both were "like new" and had no carbon anywhere to start with. I did the cleaning anyway, just for good measure and self assurance.
Welp, the Toyota 2.4L engine in these is crap and it can loose compression.
At 74k miles, if they’re real, replace spark plugs check wet/dry compression.
I am going to change the transmission fluid/filter this weekend. I was reading other forums that suggest Valvoline transmission fluid for these vehicles. Another site recommended using an additive like Lucas AT Conditioner since the box is 13 years old with only 74,000 miles. Any thoughts? Thanks, Ron
Toyota transmissions generally do not like valvoline fluid - use the recommended fluid, as far as I remember it’s Toyota ATF Type T-IV.
MAKE SURE THE FLUID YOU CHOOSE EXPLICITLY STATES COMPATIBILITY WITH THE STANDARD STATED IN YOUR MANUAL.
Do not add any additives, it is not recommended in the case of a properly shifting Toyota 4 speed.
I am getting ready to do the transmission fluid/filter change. I saw on other forums to add Lucas Transmission conditioner to the fluid change to help with seals. Is it a good idea to use additives on a vehicle 13 years old with 74,000 original miles? Thanks, Ron
Don’t add additives. Stay on top of maintenance: change engine oil (and use premium filter) every 5,000 miles or once a year, whichever comes first. Change (drain and fill) transmission fluid (and filter if applicable) every 40,000 miles.
Thanks for the advice! Ron