Should I use 10W30 conventional (Castrol GTX) or 5W30 synthetic blend (Pennzoil) in my '99 Dodge Caravan (2.4L 4-cyl, 100k miles, drive it about 3k miles/yr, near New York City, rarely gets colder than 20F in winter). Bought the car new and always used 5W30 conventional (Mobil, Pennzoil) but now seems that is no longer available. My concern with synthetic blend is that it might cause engine problems, vs. the 10W30 which might cause the oil pump to work harder at startup.
(Same question for my '02 Toyota Corolla, 1.6L 4-cyl, 100k miles and 3k miles/yr, also bought new and always used 5W30 conventional.)
It seems Castrol GTX is the only 10W30 which is truly conventional (per their website); is that correct?
Thanks.
(Same question for my '02 Toyota Corolla, 1.6L 4-cyl, 100k miles and 3k miles/yr, also bought new and always used 5W30 conventional.)
It seems Castrol GTX is the only 10W30 which is truly conventional (per their website); is that correct?
Thanks.