@hash4u I have been using 50/50 Guard oil and air filters and original Toyota filters bought from Metro, Caltex F-6 and 3S respectively without any issues and the car has clocked 119,000.
Now I use Toyota oil filter purchased from Hamza Younas autos Saddar for 450 (same is sold for 11-12 hundreds by 3S ), Guard air cleaner and I change them every 5,000 kms.
Guard too worked good till 5K
In our dusty environment it is not advisable to use any best of the best oil filter beyond 5k kms.
My friend's office has five Corollas and he has seen them running all across Pakistan for more than 200,000 kms with Guard oil filters and the cheapest (I guess red) Shell oil.
Leppon I used only once, did not feel any difference except price.