Interesting video comparing a before and after on Redline SI-1. I love this guys no nonsense approach to his videos. He's done quite a bit on Valvoline Restore and Protect as well! I'm impressed by the improvement on the injectors mostly!
Those are some truly good results, like you said the injectors had a huge improvement. Confirmation of why SI-1 is still my go to, thanks for sharing. I've had some success getting vehicles to run better doing back to back treatments as well.
guy at the counter tried to sell me on Startron when i was checking out the other day. he was convinced it was better. but i told him i've gotten consistently good results with Redline and i don't think Startron has any PEA.