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Comments
Bottom Line: Just do what the owner's manual says to do. Do NOT let dealership sell you on their 15,000, 30,000, etc. services.
I dump in a load of Techron about every six months or so and it does just fine. Have driven cars up to 150,000 miles with no problems and no loss of MPG.
If referred to district parts and service manager (DPSM), call customer service call center and open a case number.
After DPSM renders his/her opinion, get a work order and review carefully. Then, call the customer service call center a few days later and have them read exactly what DPSM entered into the computer regarding the situation.
BTW, customer service cannot do anything once DPSM makes his ruling.