Hi, i'm Luke and i own a HSP Brontosaurus off-road electric monster truck.
Ihave a very tight budget as i have just left school and do not yet have a job so running it is not very easy when it comes to new parts and stuff.
I did not have enough money to buy some model suspension oil but i did however have a bottle of engine oil lying around in my garage which i bought for my motocross bike, when i opened the bottle i decided it was way to thin to use in my bike so i put it aside hoping that a day would come thati may need it and it did!
I put the engine oil in my shock absorbers and it worked really well as i like to do a lot of big jumps so it made tha landings a lot less harsh which was great for increasing the life of my cars parts.
I noticed a few people have said to not use it as it will damage the seals and cause leaks etc. but i have not had any of these problems, i have found it to be benificial and i would reccomend using it to anyone that likes off-roading.
If you do decide to use the engine oil then make sure you use one that is not very viscous because if you use too thick an oil it will decrease the performance of your suspension as it will not flow properly through the small holes in the pistons.
I will attatch a link to a website showing you how to do it with model suspension oil, follow the same steps but rather than using model suspension oil, use the engine oil. I will also attatch a picture of the oil that i used and i will also write the name of the oil that i used,
Please rate this post and please also reply to me to let me know how it worked for you. Maybe see you at a track some day
Putoline Racing GP10 Synthetic Light 2 Stoke Gearbox Oil SAE 75w.. this will cost you around £10 for a 1 litre bottle which will last ages.
Hope i have been able to help you