Proton Exora Carbon Cleaning Malaysia
Proton Exora · 2009–present
Proton Exora 1.6T CFE uses PORT injection — fuel washes the intake valves with every combustion cycle. NO carbon buildup on intake valves. No walnut blast needed. Throttle body cleaning (RM 80–120) at 60,000–80,000 km is the only intake-related service.
Carbon Buildup — Proton Engines Malaysia
The X50/X70/X90 1.5T TGDI uses direct injection — more prone to intake valve carbon buildup than port-injected engines. Short city trips without occasional highway runs accelerate buildup. Every 3–6 months, take a 30-minute highway run at 3,000+ rpm to burn off deposits. An intake cleaning service (RM 200–400) every 50,000–80,000 km is worth considering. Saga/Persona with port injection have much less carbon risk — only standard service needed.