Shell HX7 has been excellent Alhamdulillah. I have used it in the past in a 2001 Cultus as well which was used for extensive travelling in extremely dusty and bumby environment in interior rural Punjab. Never had issues.
I always use Guard oil filter in all my cars since the 90s. I do feel that the Guard oil filter's mileage ceiling in my Liana is 5k kms.
I also use Guard air filter.
I guess the trick is to buy from the right place. I currently buy from Metro.
BTW, I used to use Shell HX7 in my Mehran as well. Drove it 90k km and the engine was in mint condition.
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