Just wanted to say first off that I have enjoyed this site and have been a regular visitor here for over the last year or so and have found it to contain some very interesting and informative subjects. Also the plain truth is that before I found this site I always thought oil was just that, plain old oil it's all the same, right? Wrong.
I have a couple of questions maybe some of you more informed oil guru's could answer for me. I have considered running John Deere+50 0W40 synthetic oil in my 2001 Duramax diesel engine for cold weather protection and easier start-ups. It is a CH4 rated oil (this is what is required for this engine) and has what looks like good lubricating properties, ie moly,zinc, etc... I had been using Rotella T 15W40 all year round but always wondered if this was the best thing for my engine especially in cold weather. By cold I mean winter temps could be as low as -25*F over night as well as highs in the daytime of maybe -5*F for stretches of maybe a week or so at a time. Has anyone ever used the John Deere+50 oil and what are your thoughts about this product?
Secondly, I have noticed in various charts and graphs that most 0W40 oils have the largest temperature variation range compared to a 5W40 or 15W40. My question is,will I harm my engine by running a 0W40 in the summer (Max ambient temps are usually no more than 95*F)By the looks of some of the charts I am covered temp. wise from about -40*F to 100*F) I don't tow anything and usually run empty. Why couldn't I run a OW40 if it incorperates a temperature range of say a 15W40 but on a broader basis? I know these may be basic questions to some, I'm still learning.
Thanks
I have a couple of questions maybe some of you more informed oil guru's could answer for me. I have considered running John Deere+50 0W40 synthetic oil in my 2001 Duramax diesel engine for cold weather protection and easier start-ups. It is a CH4 rated oil (this is what is required for this engine) and has what looks like good lubricating properties, ie moly,zinc, etc... I had been using Rotella T 15W40 all year round but always wondered if this was the best thing for my engine especially in cold weather. By cold I mean winter temps could be as low as -25*F over night as well as highs in the daytime of maybe -5*F for stretches of maybe a week or so at a time. Has anyone ever used the John Deere+50 oil and what are your thoughts about this product?
Secondly, I have noticed in various charts and graphs that most 0W40 oils have the largest temperature variation range compared to a 5W40 or 15W40. My question is,will I harm my engine by running a 0W40 in the summer (Max ambient temps are usually no more than 95*F)By the looks of some of the charts I am covered temp. wise from about -40*F to 100*F) I don't tow anything and usually run empty. Why couldn't I run a OW40 if it incorperates a temperature range of say a 15W40 but on a broader basis? I know these may be basic questions to some, I'm still learning.
Thanks