Yesterday I had the Bobs oil temp (according to temp dipstic) show 266F on a stinker here in WA after a ride to Perth and back so I sent the below email of to Penrite to ask about max OIL TEMPS before the oil starts to breakdown/deterioate
This is what I sent
I have just broken it in using the Penrite run in oil and now are running HPR Diesel 20w60( Mineral) until I get 5000ks on it and then will run the 10TENTS 20w60 ( synthetic) My question is what temp are these oils ( HPR Diesel and 10tenths) good for and what temp do they start to breakdown/deteriorate? Today a hot day here in WA my oil temp got to 266*F is the oil still doing its thing at this temp? Look forward to you feed back on the temp rates and of these oils only ever used penrite and will continue to do so
This is there responce
Based on your enquiry regarding your Harley our recommendation is:
The conversion to centigrade (F ,minus 32, times 5/9) takes us to 130C. This is coincidentally the temperature that I normally regard as the limit. No-one’s engine oil is much good if held for long periods at this temperature, but the synthetic oil will handle it better than a mineral product. Your engine is over 1900 cc (in international units) and isn’t actually listed for Australia or NZ: it’s not in my European database either. For the smaller engine… Harley-Davidson, Dyna FLD/FXD, FXDB Dyna Street Bob, GXM, 2012- Manufacturer: Harley-Davidson Motor Co. Inc., Milwaukee, USA, Drive type: Belt Cylinder capacity: 1690 cc, Engine Twin Cam 103 Petrol, 4-stroke, 2 cylinder, V, 2 valves/cyl, air cooled Year-round API: CH-4 SAE 20W-50 Below 4 API: CH-4 SAE 10W-40 Year-round API: CI-4 SAE 20W-50 Below 4 API: CI-4 SAE 10W-40 Year-round API: CJ-4 SAE 20W-50 Below 4 API: CJ-4 SAE 10W-40 They’re after a diesel type oil (it handles heat better), so because the bike is under warranty I’d actually go for the semi synthetic HPR Diesel 15 (SAE 15W-50, API CI-4+) or preferably the dedicated bike oil MC-4 ST SAE 15W-50 (semi synthetic, API CI-4 + also). After warranty, the Racing 20W-60 looks good, but then you’ve opted for synthetic over going for diesel oil. Regards, Alan Jeffery
Are you running an oil cooler on that bike ? Yesterday was 39C it turned out ! I run those "Oil cooler collars" , which slip on over a stock black oil filter , on both my CVO's and ALL my mates run them now as well They drop the oil temp 20F at least , and for 50 bucks delivered from the US they're way better than Harley's own "Premium Oil cooler kits" I started a thread on them on here 2 years ago maybe ? Buy them off US eBay 3 or 4 at a time to save on post cost.
I've tried to post the link , but either the forum or my old XP desktop are having none of it this morning ! I personally have run 100% synthetic since the mid 90's , Mobil 1 15W50, Mobil 1 V-Twin 20W50 , Redline HD20W60 , Penrite 10/10ths racing 15W50 Basically whatever I could get for the price at the time , I'm not all that "loyal" ! Rode myself to Scarboro yesterday lunchtime , and it was as hot as Hades on the way home although I hugged the coast as much as possible !
Oil temp' dipstick showing 215F when I got home.
Ando, fatten ya VE's in cruise range (or AFR'S), I bet it's running a tad lean at thse temps. My GG doesn't run that hot even belting it two up.
