Castrol 5w-30, Purolater L3000, Good Choice?

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I did an extensive search here and could not find answers so I am posting new. 2002 Dakota 4.7 with approximately 10,000 miles. I switched to Castrol Synthetic 5w-30. (I know they are the company that started the whole controversy of "what is a Synthetic Oil?"). Also installed a Purolater L3000, a full sized filter instead of the half sized. I added an extra quart for the larger filter size. Questions: Castrol Synthetic 5w-30, Group III or IV/V? Good Choice? How long until the next oil change? Most miles are highway with some in town, I'd guess a 60-40 split. Purolater L3000. Good Choice? bypass? cardboard?
 

Al

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Just my opinion here: I really don't see any advantages or very little to the Syntec over a good quality oil like Chevron Supreme 10W-30 or Castrol GTX 10W-30. The Syntec really can't go extended like Mobil 1, or Amsoil in spite of costing the same price. I like the idea of a bigger filter. I personally don't care for the Purolator because of its very thin metal cannister. I would rather go with Wix or any Champion filter.
 
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quote:
Originally posted by Dr. T: Although I now prefer Syntec over M-1 because I believe it has a better addative package...(PAO aside)...I will only vouch for grades other than 5-30 or 10-30...especially for 'severe' service. This would leave the 5-40 or 5-50 as excellent choices albeit probably not part of your owner's manual recommendation.
Why do you believe Syntec has a better additive package?
 
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Well, nothing scientific but...I've found 1. much lower consumption (same grade) 2. NO engine sounds/noises (same grade) 3. better fuel economy (same grade) 4. even better cleaning properties (completely cleaned the sludge visible from the oil filler cap area). I can't say if it has more esters or what...
 

Al

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quote:
Originally posted by Dr. T: Although I now prefer Syntec over M-1 because I believe it has a better addative package
Well to each his own and if you feel it is giving you better performance-go for it. Unfortunately its hard to have a head competition between oils-but M1 10W-30 SS has shown itself over and over to be great stuff. Has generous Moly, and TBN seems to hold up really well. Just have not seen that from Syntech. [Smile]
 
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I like the Premium Plus oil filter...tried Mobil 1,Bosch Premium,Mopar,Wix and went back to the Purolater's...good all-round value for the money for me...I use Mobil 1 oil though...dollar for dollar it's a better bargin than the Syntec...or alot of other oils for that matter.
 
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Although I now prefer Syntec over M-1 because I believe it has a better addative package...(PAO aside)...I will only vouch for grades other than 5-30 or 10-30...especially for 'severe' service. This would leave the 5-40 or 5-50 as excellent choices albeit probably not part of your owner's manual recommendation.
 
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