This place is a joke and a scam. I thought I would try them out since their prices were better than any other website but I should have shelled out the money to order from a more reputable place.I ordered a Corsa exhaust for my corvette. Their website states that items usually ship in 1-2 business days. I placed my order on Wednesday April 21st. Friday rolls around and I have not received any email other than the original invoice telling me I purchased the product which was received seconds after I originally placed my order.Monday comes around and I call their websites number that keeps stating they are busy and to call later. I find their Facebook page and call that number and actually speak with someone. The employee tells me that the exhaust is out of stock and that I should have received an email telling me this information and they dont know why I didnt. The employee tells me they can offer a refund or figure out when it will be in stock. I chose the latter and the employee tells me they will call back in 15 minutes.3 hours later I called again and low and behold the employee tells me they were right about to email me...yea, ok.....sure buddy. The employee tells me the exhaust will take 4 to 8 weeks to be ordered from Corsa. I promptly ask for my refund and the employee agrees. They tell me it should take 1-3 business days.I have still not received any email or communication telling me that my order has been canceled, or that a refund is pending, or anything along those lines, absolutely nothing. My account on their website still shows my order as awaiting fulfilment. Their website still shows the Corsa exhaust IN STOCK and you can literally still buy the exhaust even though they are in fact OUT OF STOCK.This company is unprofessional and in no way will ever receive my business again. The sad thing is, if there was just a single ounce of communication on the stores behalf, I would be so much more understanding. But to take $1100 from me and then leave me in the dark and your excuse is oh you should have received an email, I dont know why you didnt just shows the laziness and carelessness of the business to not put their customers first.They know sure and well why I didnt receive an email and they know sure and well why they said they would call me back in 15 minutes but then didnt and its because they know sure and well their business is a joke.DO NOT BUY FROM THIS WEBSITE!!!

I never received the tool box I ordered and can’t get a refund. I’m out 1100 bucks. No one returns emails or phone calls. Fraud

I have used few of their products and I am impressed with the performance improvement I have noticed. Its very easy to use the products without being an expert, if you are buying engine oil simply take it to the service place you prefer and ask them to use your own oil, they will only charge for the labor. Since the oils are high mileage, I suggest you take a high mileage oil filter as well as engine filter from AutoZone or similar parts store. Diesel Power USA also sells some additives such as Jectron for fuel injector and Fuel System cleaner which certainly improves the performance, gas mileage and ultimately the engine life. You just keep a log in your cell phone every time you use the additive and you will notice the improvement. I have bought their few other products to be used in cooling system and etc, I have yet to try those out, I am confident those will also add value for the bucks. Give these people a try, they won’t disappoint you!

Simply SUPERB!! I was surprised to find the motor oil that I use for my vehicle ( liqui Moly). Fast shipping as well. Definitely recommend this place. Keep up the good work.👍

I m so happy with theirs products it’s simply miracle and awesome . I can see the difference before and after use theire products it’s really worth it . I m highly recommend them to my friends and family . Awesome customer service and fast shipping so impressed !!

EXCELLENT seller, quick shipping. Optilube makes a noticeable difference in injector noise and overall feels smoother.

What a great service!!!!!!! Kudos to the team. Fast shipping and great customer services. Will buy again.

Great service! Very trustworthy

Great price and quick service. prompt response to questions

Great service and insight, highly recommend 🙂

Best Product, best smiles, best service. Recommended! !

Great products and Fast shipping. Highly recommended.

Opti-lube works great and arrived fast in good condition. I will recommend to all my friends.

The best place and the greatest deals for automotive additives, oil and afternarket parts.

Awesome store. Best service and prices

Excellent Purchase Experience!Prices brought me in...Quality of Servicing will keep me coming back...

Super fast shipping.

Good purchase experience. Thank you.