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I am trying to decide between Mobile 1 5-W40 Synthetic or sticking with conventional Rotella 15-W40. Is it worth the expense to go with the synthetic? I change my oil about every 3000 miles. Thanks!
 

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why not rotella t-6 5w 40 syn? at walmart
 

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If you are going to change your oil every 3000 miles, go with Dino oil... If you want longer drain intervals go with Synthetic..

I just changed my oil yesterday with the Mobile 1 Delvac 5-w40.. Looks to be a good oil !~!
 

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If you will still change it at 3000 miles even with synthetic, then don't waste the money on the synthetic, just use dino. Even the dino oil will last far past 3000. If you plan to go for longer intervals with the synthetic then it might be worth it.
 

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I just bought 20 liters of Rotella T 15w-40 from walmart, 66$ for 20 liters isnt to bad i figure
 
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