Only positive impressions from Idemitsu. I won’t speak for all the oils, but the Zeprov version for European cars has top oils at the highest level. I am a car traveler, so to speak, and I wind many kilometers under significant loads. The engine is always clean, no extraneous noise and disturbing sounds. Replacement is always regular every 10,000. Oil does not turn into oil. I speak only for myself, tk. I have a Volkswagen, and my good friend from our autotravel club, who owns a Toyota, drew my attention to Japanese oil. Actually, it happened so by chance that I pour Japanese oil. I don't regret it at all.
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