My conclusion was to use the best Castrol in the gold bottle. Of course, YOU must use the specification of weight recommended by the owners manual for the temperature range you expect to be operating in.
The gallon of Castrol is the same whether you buy it at CT or Napa.
You’ll be fine, idemitsu is a bit of a rotary specialist when it comes to fluids
Personally I always run Castrol and it's done me well, even in older cars that had been a bit battered.
Been using the molygen one, noticed a small reduction of oil consumption and better idling than Castrol (VW recommended)
I use the blue bottle 5w-40 on my 2.5 Mk5 Rabbit.
Runs quieter than when i used Castrol High Mileage.
About $22 for 5 Qts. of Castrol (you can buy it on Amazon or at Walmart for a decent price). Filter is about $4.00 or more if you buy a premium filter.
Germany, 320d, 2008, 280000km, Castrol Edge 5w-30. Every 15000km
Regardless, I haven't heard of Aral, but I wouldn't knock it without proof that's worse than Castrol.
Mine eats Castrol Syntec 5w40 like it's going out of style as well.
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